There are many reasons for hair loss. Conditionally, they can be divided into "external" - stress, exposure to adverse environmental factors (sun, fluctuations in temperature, humidity), aggressive substances, improper care (dying, hair dryer, curling irons, etc.), taking medications, exceptional diets, etc.; and "internal" ones - when a change in the skin and hair condition is indicative of painful changes in the internal condition of our body. Here the possible list is even more significant – hormone imbalance is only one of the possible reasons. Trichologist, a specialized specialist, can help to deal with the type of hair loss, determine the possible causes, draw up a plan of examination and treatment.