Androgenetic alopecia

Androgenetic alopecia is the most common type of hair loss. It is influenced by genes and by the way hair follicles respond to hormones called androgens. Over time, affected follicles produce finer, shorter hairs, a process known as miniaturisation.

In men it often shows as a receding hairline or thinning at the crown. In women it more often shows as gradual thinning over the top of the head, with a widening parting, while the front hairline usually stays in place. It tends to develop slowly over years rather than weeks.

There are licensed treatments, and a GP, pharmacist or dermatologist can explain the options, their side effects and whether they suit you. Women with pattern thinning alongside irregular periods, acne or extra facial hair should mention this to their GP, as it can point to a hormonal cause worth checking.