Will hair grow back after it falls out?

Mar 28, 2025 Source: Cainiu Health
Disease description:

I am a 28-year-old male. Recently, I have noticed that I'm losing more hair than before, especially during shampooing and combing. I'm very concerned whether the hair that falls out will grow back.

Doctor's answer (1)
Dr. Liu Wenmin

Whether hair will regrow after falling out depends on the cause of hair loss and the health of the hair follicles. Normally, losing 50 to 100 hairs per day is considered physiological hair loss, which is part of the hair growth cycle, and the lost hair typically regrows. However, if hair loss is caused by diseases, stress, malnutrition, or genetic factors, a more specific analysis is required. For example, temporary hair loss usually recovers once the triggering factors are removed, while hereditary hair loss is a common chronic condition. Influenced by genetic factors, hair follicles gradually shrink, causing the hair to become thinner and shorter, eventually preventing the regrowth of healthy hair.

To promote hair regrowth, it is recommended to start with lifestyle modifications, maintain a balanced diet, and consume more foods rich in protein, iron, zinc, and vitamins. Avoid excessive use of hair dyes, styling tools, and other products that may damage the hair, minimizing scalp irritation. Additionally, ensuring adequate sleep and engaging in regular exercise can help relieve stress and improve blood circulation, thereby providing a better growth environment for hair follicles. If hair loss persists or worsens, timely medical consultation and examination are advised.