Why does hair fall out in autumn?
While androgenic alopecia is due to an increase in the sensitivity of certain areas of the scalp to local hormones , hair loss in autumn is due to a normal alteration of the hair cycle . In this season, a completely normal process begins which consists in the desynchronization of the hair cycle so that, under normal conditions, most of the hair is in the anagen phase (anchored to the scalp), at this time of the year a change to the telogen phase (fall phase) occurs, which after a variable time is regularized only, so that most hairs recover the anagen phase.
Falling hair in autumn does not mean that we suffer from alopecia, a pathology that worries men and women alike and that increases with age. “Androgenic alopecia consists of an excessive and progressive loss (not self-limited in time), which usually leads to the fall of more than one hundred hairs a day ; It has nothing to do with the loss of hair we have in the autumn, called acute telogen effluvium, “explains María Teresa Truchuelo, dermatologist at the Vithas Nuestra Señora de América Hospital in Madrid.
There are many reasons and factors that can influence and cause the dermis to begin to detach from the hair. “First of all we must know that the occasional hair loss is normal and the real problem appears when it does not regenerate . If this happens, we must recognize the cause and treat it properly, “advises the specialist.
These are the main causes of hair loss:
- Excessive loss of hair is often associated with an excessive secretion of sebum that greases the scalp, irritates it and limits the capillary growth cycle, which produces an increasingly thin and weak hair.
- Stress, both physical and emotional, and anxiety are factors that can trigger hair loss.
- Strong brushing and the use of shampoos or excessive aggressive treatments(permanent, straightened, etc.) are mechanical causes that can explain the loss of capillary density and the appearance of bald spots.
- Surgical operations and medical treatments such as chemotherapy can also cause baldness. As Truchuelo explains, before certain diseases or drugs “the body reacts with the loss of what it considers a luxury material: hair. In these cases, you should check with your doctor and see if you can change the medication and follow its instructions, “he advises.
- Skin diseases such as lupus , lichen planar pillar or fungi can cause hair loss. “Always and in any of these cases, the advisable thing is to put yourself in the hands of a dermatologist so that it indicates what medicines, guidelines, etcetera, follow to avoid the loss of hair”, explains the expert.
- Hormonal changes can also give rise to an episode of alopecia. Particularly delicate moments are menopause and postpartum.
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