Alopecia areata, also known as spot baldness, is a condition in which hair is lost from some or all areas of the body

Sometimes called solar keratosis or senile keratosis, is a pre-cancerous area of thick, scaly, or crusty skin.

Aphthous stomatitis is a common condition characterized by the repeated formation of benign and non-contagious mouth ulcers.

Azathioprine (AZA), sold under the brand name Imuran among others, is an immunosuppressive medication.

Acne, also known as acne vulgaris, is a long-term skin disease that occurs when dead skin cells and oil from the skin clog hair follicles