Consultation with doctors can help answer this question. First of all, it is important to examine the scalp itself. If no problems are found, it is recommended to carry out basic blood tests to assess the general state of the body – for hormones, main organs and microelements. Once the problem is discovered, it should be addressed first, and if all the tests are within normal limits, genetics or weather changes may be to blame. In the latter cases, hair growth-promoting injections come to the rescue.