94 Diseases That Start With The Letter A

Have you ever wondered about diseases that start with the letter “A”? Wonder no more, this article is exactly what you are looking for.

In this article, I will dive into the realm of some known and lesser-known diseases beginning with this enigmatic letter A, aiming to raise awareness and understanding.

So, without any further ado, let’s embark on this fascinating journey and broaden our understanding of diseases that start with the letter A.


Diseases That Start With A

The followings are some known and lesser-known diseases that begin with the letter A (In alphabetical order):

1. Abdominal Aortic Aneurysm: Abdominal Aortic Aneurysm is a condition characterized by a bulge in the aorta, the main blood vessel supplying blood to the abdomen, pelvis, and legs. If left untreated, it can lead to life-threatening complications like a rupture. Regular check-ups are essential for early detection and intervention.

2. Abdominal Pain: Abdominal pain can stem from various causes, such as indigestion, infections, or appendicitis. It is crucial to identify the underlying issue to provide the appropriate treatment.

3. Abscess: An abscess is a localized collection of pus caused by bacterial infections. Proper drainage and antibiotics are often required for effective management.

4. Abuse Of Alcohol: Alcohol abuse can lead to numerous physical and psychological health issues, including liver disease, addiction, and mental health disorders. Seeking professional help is essential for recovery.

5. Acidosis: Acidosis is a condition characterized by an imbalance of acid in the blood. Treatment depends on the underlying cause and may involve medications or intravenous fluids.

6. Acne: Acne is a common skin condition caused by clogged hair follicles. Maintaining good skincare practices and using prescribed medications can help manage it effectively.

7. Acquired Immunodeficiency Syndrome (AIDS): AIDS is caused by the human immunodeficiency virus (HIV) and weakens the immune system, making individuals susceptible to infections. Early diagnosis and antiretroviral therapy can significantly improve the quality of life for those affected.

8. Acromegaly: Acromegaly results from an excess of growth hormone, leading to abnormal enlargement of body tissues. Treatment often involves surgery, medication, or radiation therapy.

9. Actinic Keratosis: Actinic keratosis is a skin condition caused by prolonged sun exposure. Regular skin checks and sun protection can prevent its progression into skin cancer.

10. Actinomycosis: Actinomycosis is a rare bacterial infection that can affect various body parts. Antibiotics are typically prescribed for treatment.

11. Acute Bronchitis: Acute bronchitis is characterized by inflammation of the bronchial tubes and is usually caused by viruses. Rest and staying hydrated are recommended for recovery.

12. Acute Cholecystitis: Acute cholecystitis is inflammation of the gallbladder and often requires medical intervention or surgery.

13. Acute Cough: An acute cough may arise due to respiratory infections or allergies. Addressing the underlying cause is essential for relief.

14. Acute Lymphoblastic Leukemia: Acute lymphoblastic leukemia is a cancer that affects the white blood cells. Timely diagnosis and aggressive treatment are necessary for better outcomes.

15. Acute Myeloid Leukemia: Acute myeloid leukemia is another type of blood cancer that requires prompt medical attention and specialized care.

16. Acute Pancreatitis: Acute pancreatitis is inflammation of the pancreas and can be caused by gallstones, alcohol consumption, or certain medications. Hospitalization and supportive care are often needed.

17. Acute Sinusitis: Acute sinusitis results from inflammation of the sinuses due to infections. Rest, fluids, and over-the-counter medications can help alleviate symptoms.

18. Addison’s Disease: Addison’s disease occurs when the adrenal glands do not produce enough hormones. Lifelong hormone replacement therapy is the standard treatment.

19. Adenoiditis: Adenoiditis is the inflammation of the adenoids, which are glands located at the back of the throat. Antibiotics or, in severe cases, surgery may be necessary.

20. Adenomyosis: Adenomyosis is a condition where the inner lining of the uterus grows into the muscular wall, causing pain and heavy menstrual bleeding. Treatment options include medications or surgery.

21. Adenovirus Infection: Adenovirus infection is a common viral illness that can affect the respiratory system, causing symptoms similar to the common cold or flu. Most cases resolve on their own with rest and supportive care.

22. ADHD (Attention Deficit Hyperactivity Disorder): ADHD is a neurodevelopmental disorder characterized by symptoms of inattention, hyperactivity, and impulsivity. Behavioral therapy and medications are commonly used for management.

23. Adrenal Insufficiency: Adrenal insufficiency occurs when the adrenal glands don’t produce enough hormones, leading to fatigue, weight loss, and low blood pressure. Lifelong hormone replacement therapy is essential for those affected.

24. Agranulocytosis: Agranulocytosis is a severe decrease in the number of white blood cells, making individuals prone to infections. Identifying and addressing the underlying cause is crucial for treatment.

25. AIDS/HIV (Acquired Immune Deficiency Syndrome): As mentioned earlier, AIDS is the final stage of HIV infection, which can severely weaken the immune system. Early diagnosis, antiretroviral therapy, and preventive measures are vital.

26. Albinism: Albinism is a genetic condition characterized by the absence of pigment in the skin, hair, and eyes. People with albinism are more sensitive to sunlight and require sun protection.

27. Alcoholic Liver Disease: Excessive alcohol consumption can lead to liver damage, ranging from fatty liver to cirrhosis. Avoiding alcohol and adopting a healthy lifestyle are essential for managing the condition.

28. Alkhurma Haemorrhagic Fever: Alkhurma haemorrhagic fever is a viral disease transmitted by ticks. There is no specific treatment, but supportive care can help alleviate symptoms.

29. Allergic Rhinitis: Allergic rhinitis, commonly known as hay fever, is an allergic reaction to pollen, dust, or pet dander. Antihistamines and nasal corticosteroids can provide relief.

30. Allergies: Allergies can manifest as various symptoms, such as sneezing, itching, or hives, when the immune system overreacts to certain substances. Avoiding triggers and allergy medications are typical management approaches.

31. Alopecia: Alopecia, or hair loss, can have various causes, including genetics, autoimmune disorders, or medical treatments. Treatment options range from medications to hair transplant surgery.

32. Alveolar Osteitis: Alveolar osteitis, commonly known as dry socket, is a painful condition that can occur after tooth extraction. Management includes pain relief and keeping the socket clean.

33. Alzheimer’s Disease: Alzheimer’s disease is a progressive neurodegenerative disorder leading to memory loss and cognitive decline. While there is no cure, early diagnosis and supportive care can help manage symptoms.

34. Amebiasis: Amebiasis is an intestinal infection caused by the parasite Entamoeba histolytica. Antiparasitic medications are used for treatment.

35. Amnesia: Amnesia is a condition characterized by memory loss. Treatment depends on the underlying cause, and rehabilitation strategies may be employed.

36. Amniotic Band Syndrome: Amniotic band syndrome occurs when fibrous bands from the amniotic sac entangle and restrict fetal development. Treatment depends on the severity and location of the bands.

37. Amyotrophic Lateral Sclerosis (ALS): ALS is a progressive neurological disease that affects nerve cells in the brain and spinal cord, leading to muscle weakness and paralysis. There is no cure, but supportive care can enhance the quality of life.

38. Anal Cancer: Anal cancer can be caused by the human papillomavirus (HPV) and other risk factors. Treatment options include surgery, radiation, and chemotherapy.

39. Anaphylaxis: Anaphylaxis is a severe allergic reaction that requires immediate medical attention. It can be life-threatening, but prompt administration of epinephrine can save lives.

40. Anaplasmosis: Anaplasmosis is a tick-borne disease that can cause flu-like symptoms. Antibiotics are commonly prescribed for treatment.

41. Anemia: Anemia is a condition where the body lacks enough healthy red blood cells to carry oxygen to tissues. Treatment depends on the underlying cause and may involve iron supplements or blood transfusions.

42. Angina: Angina is chest pain or discomfort caused by reduced blood flow to the heart muscle. Lifestyle changes, medications, and sometimes procedures like angioplasty are used to manage the condition.

43. Angioedema: Angioedema is swelling beneath the skin, often around the face and lips, caused by an allergic reaction. Antihistamines and corticosteroids may be used for treatment.

44. Ankylosing Spondylitis: Ankylosing spondylitis is a form of arthritis that primarily affects the spine. Exercise, physical therapy, and medications are used to manage symptoms and prevent complications.

45. Anorexia Nervosa: Anorexia nervosa is an eating disorder characterized by a distorted body image and an intense fear of gaining weight. Treatment involves therapy, nutritional counseling, and medical support.

46. Anthrax: Anthrax is a rare but serious bacterial infection that can be acquired through contact with infected animals or contaminated materials. Antibiotics are used for treatment.

47. Antiphospholipid Syndrome: Antiphospholipid syndrome is an autoimmune disorder that can lead to blood clots and pregnancy complications. Anticoagulants may be prescribed to manage the condition.

48. Anxiety: Anxiety is a common mental health condition characterized by excessive worry and fear. Therapy, lifestyle changes, and medications can be effective in managing anxiety.

49. Anxiety Attack: An anxiety attack is a sudden episode of intense fear or panic. Breathing techniques and relaxation exercises can help during an anxiety attack.

50. Anxiety Disorder: An anxiety disorder is a chronic condition that requires professional treatment. Therapy, medication, and coping strategies are often used to manage anxiety disorders.

51. Aortic Aneurysm: An aortic aneurysm is a bulge in the wall of the aorta, the body’s main artery. It can be life-threatening if it ruptures and requires careful monitoring or surgery.

52. Aortic Regurgitation: Aortic regurgitation occurs when the aortic valve doesn’t close properly, causing blood to flow back into the heart. Treatment depends on the severity and may involve medications or valve replacement.

53. Aortic Stenosis: Aortic stenosis is the narrowing of the aortic valve, restricting blood flow from the heart. Treatment may include medications or surgical intervention.

54. Aortic Valve Stenosis: Aortic valve stenosis is a specific type of heart valve disease where the aortic valve narrows, impairing blood flow. Treatment options include medications or valve replacement.

55. Apert Syndrome: Apert syndrome is a genetic disorder characterized by craniofacial abnormalities and fused fingers and toes. Surgery may be necessary to correct physical deformities.

56. Aphasia: Aphasia is a communication disorder that impairs a person’s ability to speak, write, or understand language. Speech therapy and rehabilitation can be beneficial for recovery.

57. Aplastic Anemia: Aplastic anemia is a rare blood disorder where the bone marrow fails to produce enough blood cells. Treatment may involve blood transfusions or stem cell transplantation.

58. Appendicitis: Appendicitis is inflammation of the appendix and typically requires surgical removal to prevent complications.

59. Arachnoid Cyst: Arachnoid cysts are fluid-filled sacs that can form on the brain or spinal cord. Treatment depends on the location and size of the cyst.

60. Arenavirus: Arenaviruses are a group of viruses transmitted by rodents that can cause severe infections in humans. There is no specific treatment, and supportive care is essential.

61. Arm Injury: Arm injuries can range from fractures to sprains and strains. Rest, immobilization, and physical therapy are commonly used for recovery.

62. Arm Pain: Arm pain can result from various causes, including injuries, nerve compression, or overuse. Identifying the underlying issue is crucial for appropriate treatment.

63. Arrhythmia: Arrhythmia is an irregular heart rhythm that can lead to complications. Treatment may involve medications, cardioversion, or implantable devices like pacemakers.

64. Arteriovenous Malformations: Arteriovenous malformations are abnormal tangles of blood vessels that can occur in the brain or other organs. Treatment options include surgery or embolization.

65. Arthritis: Arthritis is a group of conditions causing joint inflammation and pain. Treatment may include medications, physical therapy, and lifestyle changes.

66. Arthrogryposis: Arthrogryposis is a congenital condition characterized by joint contractures, limiting movement. Treatment may involve physical therapy and orthopedic interventions.

67. Asbestosis: Asbestosis is a lung disease caused by inhaling asbestos fibers. There is no cure, but management focuses on symptom relief and preventing complications.

68. Ascariasis: Ascariasis is a parasitic infection caused by roundworms. Antiparasitic medications are used for treatment.

69. Aspergillosis: Aspergillosis is a fungal infection that can affect the lungs and other organs. Antifungal medications are used for treatment.

70. Asthma: Asthma is a chronic respiratory condition characterized by airway inflammation and narrowing. Inhalers and lifestyle adjustments are used to manage symptoms.

71. Asthma Attack: An asthma attack is a sudden worsening of asthma symptoms that requires prompt use of rescue inhalers and, if severe, emergency medical attention.

72. Asthma Attack: An asthma attack is a sudden worsening of asthma symptoms that requires prompt use of rescue inhalers and, if severe, emergency medical attention.

73. Ataxia: Ataxia is a neurological disorder affecting coordination and balance. Treatment focuses on managing symptoms and addressing the underlying cause.

74. Atherosclerosis: Atherosclerosis is the buildup of plaque in the arteries, leading to reduced blood flow. Lifestyle changes and medications can help manage the condition.

75. Athlete’s Foot: Athlete’s foot is a fungal infection affecting the feet. Antifungal creams and good foot hygiene can resolve the infection.

76. Atopic Dermatitis: Atopic dermatitis, also known as eczema, is a chronic skin condition causing red, itchy rashes. Moisturizers and topical steroids are commonly used for treatment.

77. Atopic Eczema: Atopic eczema, or dermatitis, is a chronic inflammatory skin condition. Treatment involves avoiding triggers and using emollients and corticosteroids.

78. Atrial Fibrillation: Atrial fibrillation is an irregular and often rapid heart rate that can increase the risk of stroke. Treatment may involve medications or procedures to restore normal heart rhythm.

79. Atrial Flutter: Atrial flutter is another type of abnormal heart rhythm that requires medical evaluation and management.

80. Atrial Septal Defect: Atrial septal defect is a congenital heart defect where there is a hole in the wall between the heart’s upper chambers. Surgery may be necessary to repair the defect.

81. Atrioventricular Septal Defect: Atrioventricular septal defect is a heart defect involving abnormalities in the heart’s valves and septum. Surgery is usually required to correct the condition.

82. Atrophic Vaginitis: Atrophic vaginitis is inflammation of the vaginal walls due to reduced estrogen levels. Hormone therapy or vaginal moisturizers may be used for relief.

83. Attention Deficit Hyperactivity Disorder (ADHD): ADHD is a neurodevelopmental disorder affecting attention, hyperactivity, and impulsivity. Behavioral therapy and medications can help manage symptoms.

84. Atypical Pneumonia: Atypical pneumonia is a type of pneumonia caused by bacteria or viruses other than the common ones. Antibiotics or antiviral medications are used for treatment.

85. Autism: Autism, or autism spectrum disorder (ASD), is a developmental condition affecting communication and social interaction. Early intervention and behavioral therapies are vital for children with autism.

86. Autistic Spectrum Disorder (ASD): As mentioned earlier, this term refers to the range of developmental conditions under the autism spectrum. It encompasses various conditions, and treatment is tailored to individual needs.

87. Autoimmune Disorders: Autoimmune disorders occur when the immune system attacks healthy cells in the body. Management often involves immunosuppressive medications.

88. Autoimmune Hepatitis: Autoimmune hepatitis is inflammation of the liver caused by the immune system attacking liver cells. Immunosuppressive drugs are used to manage the condition.

89. Avian Influenza: Avian influenza, or bird flu, is a viral infection primarily affecting birds but can rarely infect humans. Prevention and surveillance measures are crucial to controlling outbreaks.

90. Avian Influenza Virus: This term refers to the virus responsible for avian influenza, which is classified into various strains with different levels of severity.

91. Axial Osteomalacia: Axial osteomalacia is a type of bone disorder caused by vitamin D deficiency, leading to weakened bones. Vitamin D supplements are used for treatment.

92. Axial Osteosclerosis: Axial osteosclerosis is a rare bone disorder characterized by increased bone density. Treatment may involve managing complications like fractures.

93. Axial Spondyloarthritis: Axial spondyloarthritis is a type of inflammatory arthritis affecting the spine and sacroiliac joints. Treatment includes medications and physical therapy.

94. Ayazi Syndrome: Ayazi syndrome is a medical condition characterized by congenital limb malformations. Treatment aims to improve limb function and appearance through surgical interventions.


I hope you found this article “Diseases That Start With A” helpful and got insights into some of the rare and lesser-known medical conditions.

Also, keep in mind that, this isn’t an exhaustive list, if there are any Diseases starting with the letter A.

Feel free to leave a comment below with the missing Disease and I’ll update the list as soon as possible.

And, if you’d like to explore more Diseases starting with different letters of the alphabet, click the link below:

  • Diseases That Start With B
  • Diseases That Start With C
  • Diseases That Start With D
  • Diseases That Start With E

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