Scalp
The scalp is the area of the head where head hair grows. It is made up of skin, layers of connective and fibrous tissues, and the membrane of the skull. Anatomically, the scalp is part…
May 22, 2026
Journal
Health stories worth your time.
Articles by our specialists on prevention, treatment and well-being.
Dihydrotestosterone
Dihydrotestosterone is an endogenous androgen sex steroid and hormone primarily involved in the growth and repair of the prostate and the penis, as well as the production of sebum and body hair composition.
May 22, 2026
Dutasteride
Dutasteride, sold under the brand name Avodart among others, is a medication primarily used to treat the symptoms of a benign prostatic hyperplasia (BPH), an enlarged prostate not associated with cancer. A few months may…
May 22, 2026
Finasteride
Finasteride, sold under the brand names Proscar and Propecia among others, is a medication used to treat pattern hair loss and benign prostatic hyperplasia (BPH). It can also be used to treat excessive hair growth…
May 22, 2026
Minoxidil
Minoxidil, sold under the brand names Loniten and Rogaine among others, is a medication used for the treatment of high blood pressure and hair loss. It may also be used off-label to promote beard growth…
May 22, 2026
Trichology
Trichology is the study of the hair and scalp. The term derives from Ancient Greek θρίξ (thríx), "hair" and -λογία -logia. In most jurisdictions the title of a trichologist, not the field of trichology, is…
May 22, 2026
Hair loss
Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. Typically at least the head is involved. The severity of hair loss can vary…
May 22, 2026
Hair follicle
The hair follicle is an organ found in mammalian skin. It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions. The hair follicle…
May 22, 2026
Telogen effluvium
Telogen effluvium is a scalp disorder characterized by the thinning or shedding of hair resulting from the early entry of hair in the telogen phase. It is in this phase that telogen hairs begin to…
May 22, 2026
Alopecia areata
Alopecia areata (AA), also known as spot baldness, is a condition in which hair is lost from some or all areas of the body. It often results in a few bald spots on the scalp,…
May 22, 2026
Pattern hair loss
Pattern hair loss, also known as androgenetic alopecia, is a hair loss condition that primarily affects the top and front of the scalp. In male-pattern hair loss, the hair loss typically presents itself as either…
May 22, 2026