Many people experience increased hair shedding during the winter, and dermatologists say this seasonal pattern is not uncommon. While the exact reasons are complex, the cold weather and dry indoor conditions can lead to brittle hair and a flaky scalp, both of which may cause more hair to fall out. Experts point out that hair naturally cycles through periods of growth and rest, and these cycles may result in more shedding during late fall and winter.
Board-certified dermatologists emphasize that healthy hair starts with a healthy scalp. Dry air, cold temperatures, and heating systems indoors can dry out both hair and scalp, sometimes worsening issues like dandruff and scalp psoriasis. These conditions, in turn, increase hair shedding. Furthermore, less exposure to sunlight during winter can lower vitamin D levels, which plays a role in hair growth.
Mechanical stress is another factor of concern. Wearing hats, scarves, or thicker clothing can rub against hair and lead to breakage, which is often mistaken for true hair loss. Specialists suggest being careful with styling and avoiding tight hairstyles, especially when hair is wet, to minimize breakage.
To protect hair during colder months, dermatologists recommend several practical steps. Using gentle, hydrating shampoos and nourishing conditioners helps retain moisture. It’s best to wash hair less often and use lukewarm rather than hot water. Applying conditioner mainly to the middle and ends of hair can prevent dryness. Limiting the use of heat styling tools like blow dryers and curling irons is also beneficial, and using a heat protectant spray can help reduce damage.
Maintaining a balanced diet is important for hair health. Adequate intake of protein, iron, zinc, and vitamin D supports hair growth. Experts also recommend using a humidifier in the home to add moisture back into the air. For significant hair thinning rather than seasonal shedding, treatments like topical minoxidil may be considered, but a professional diagnosis is necessary before starting any treatment. For people with color-treated or processed hair, a weekly deep-conditioning mask can help replenish moisture and restore smoothness. Medicated shampoos such as Nizoral, which contain ketoconazole, are effective in treating dandruff and are suitable for all hair types, including chemically treated ones.
