M-shaped hair loss, also known as a receding hairline or widow's peak, is a common pattern of hair loss often associated with androgenetic alopecia, particularly in men. This type of hair loss is characterized by the following features:
Receding Hairline
The hairline gradually moves backward, typically starting at the temples, creating an "M" shape. The hair at the front center of the scalp (the peak of the "M") may remain intact for a longer period, creating a distinct pattern.
Temple Thinning
Hair loss begins at the temples and progresses towards the back of the head. The hairline forms a noticeable "V" or "M" shape as the hair recedes.
Crown Thinning
Often, M-shaped hair loss can be accompanied by thinning at the crown (the top of the head), although this varies from person to person.
Gradual Progression
The process is usually gradual, with the hairline receding slowly over several years.
Genetic Predisposition
This pattern is commonly inherited and influenced by genetic and hormonal factors. Androgens (male hormones) affect hair follicles, shortening the growth phase of hair and causing miniaturization of the follicles over time.
Visible Scalp
As the hairline recedes, more of the scalp becomes visible, particularly at the temples and the front part of the scalp.
M-shaped hair loss can begin as early as late teens or early twenties and progresses with age. Treatment options include medications like minoxidil and finasteride, hair transplant surgery, and lifestyle changes to manage and slow down the progression. Consulting with a healthcare provider or dermatologist is recommended for proper diagnosis and treatment planning.