Hair loss, balding, thinning and weakening hair
Healthy person, loss of hair: male pattern baldness (baldness of hormonal origin)
In cases of male pattern baldness (alopecia androgenica), the hormone DHT (dihydrotestosterone), a testosterone derivative, plays the key role. This hormone is produced locally in the skin, and its most common effect is that it impacts the hair follicles and causes the hair loss.
Not all hair follicles are equally sensitive to DHT. The hairs at the front and on the sides of the scalp are the sensitive ones, while above the nape of the neck, the hairs are completely insensitive. The attached Hamilton-Norwood scale, the images of which illustrate the stages of hormonal hair loss, show exactly which hairs are sensitive and which are not.
DHT is also the culprit when women experience hormonal hair loss. Most of the hormone-sensitive hair follicles and thus the place site where hair loss usually starts is at the middle of the crown of the head. The stages are represented by the Ludwig hair density scale.
Hair loss caused by other conditions
Any number of medical conditions or hazards can lead to the thinning of hair. The root causes of hair loss might be a lengthy illness, major surgery, psychological trauma or constant stress, a thyroid gland malfunction, fungal skin infections, autoimmune diseases, poor nutrition, use of unsatisfactory cosmetic products or the side effects of certain medications.
Qualified dermatologists and internal specialists are the doctors who investigate the causes of hair loss that is not of androgenic origin. The best results can be achieved by targeted therapy after determining the root cause.
Scarring on the scalp can occur after surgery, from some other injury or from a burn. The traditional "strip" hair transplant, when a whole strip of skin is removed from the area above the nape of the neck to extract hair follicles for transplant also leaves permanent, and sometimes even quite wide, scars. (We do not use this hair transplant method).
Scar tissue does not contain natural pigments; it is different from normal skin in the structure of its fibrous tissue and it does not contain hair follicles. However, it is healthy living tissue and is capable of retaining a significant proportion of the hair follicles we implant in it.
The implanted hairs will cover the scar and the end result will be a look about the same as the surrounding hairy scalp (scar treatment).
Hair that gets pulled out
If the scalp has lost hair follicles because of external trauma (such as a bunch of hair torn out in an accident or because of trichotillomania (a compulsion to pull out one's own hair), a hair transplant can be an excellent solution. In cases of trichotillomania, treatment of the mental disorder must precede the surgery.