Normal cycle of hair growth lasts for about 2-3 years (anagen phase). During this phase, each hair grows for about 1cm a month. At each moment, about 90% of hair on the scalp is in growing phase, while 10% is in resting phase (telogen phase). Hairs which have been in resting phase fall out after 3-4 months and new hair grows in their place. Increased hair loss can appear in all ages, at children, female and male population.

Causes of hair loss

Majority of population loses 50-100 hairs each day. Having in mind that the scalp has around 100 000 hairs, we do not pay too much attention to this information. Gradual hair thinning is considered as normal part of the ageing process. However, hair thinning may occur as a result of another disease: several months after the disease termination, after surgeries, delivery, hormone disorders (thyroid hormones, testosterone, estrogen), tooth inflammation, internal organ inflammation, anemia.
Unhealthy nutrition - insufficient intake of specific amino acids (cysteine, methionine), iron, copper, zinc, etc. Additional, insufficient intake of some vitamins may result in the lack of substrate for hair generation.
Medical treatments – chemotherapy and radiotherapy may result in hair loss. After these treatments hair grows again.
Many women have reported excessive hair loss 3 months after delivery. However, this hair loss occurs due to hormones and hair grows back once the hormones are back in balance.
Some medications may cause hair loss (anticoagulants, oral contraceptives, antidepressants, retinoides).
Fungal infections of the scalp may cause hair loss. Moreover, hair loss may represent a symptom of another disease, e.g. lupus, anemia, etc. and is not to be ignored.

Permanent and temporary hair loss

Medical term for hair loss is alopecia. Androgenetic alopecia is the most frequent permanent type of hair loss which affects one third of female and male population.

 

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