Alopecia is one of the most common disorders in our time, which results in a generalized or local loss of a significant amount of hair.
It may be due to a variety of causes, including hereditary and hormonal factors, fungal infections, malnutrition or even of an autoimmune etiology.
The most common alopecia in men is the androgenetic one, namely the baldness, while, in women, there is no form in an overwhelming majority.
Non Cicatricial (Non Scarring) Alopecias
1. Androgenetic Alopecia
The thinning on the front, side and top of the head is one of its characteristics.
2. Normal Alopecia
A loss of about 100 hairs per day is observed.
3. Alopecia Areata
An autoimmune disease in which the body recognizes the hair follicles as a foreign body, forcing them to “fall”.
Decisive factors for the disease progression:
Types of alopecia areata:
- Simple forms
- Extensive forms
- Ophiasis, more for the cervical, occipital and temporal areas
- Total alopecia areata, loss of all hair of the head
- Alopecia Universalis, loss of all body hair
- Diffuse alopecia areata (Alopecia areata incognita)
4. Diffuse Alopecia
A type of diffuse alopecia may be:
- Acute, during the hair is suddenly lost
- Subacute, in which the fall of hair takes several months
- Chronic, in which the thinning cycle tends to be repeated with a duration of about 6 months
Causes of diffuse alopecia:
- Diseases, intense physical or psychological injuries
- Strict diets
- Postoperative stress
- Problems of the thyroid gland
- Chronic diseases (lupus erythematosus, liver / kidney problems)
- Heavy metal poisoning
- Various medications
- Start or stop of the intake of contraceptive pills
5. Anagen Effluvium
6. Alopecias under the influence of injurious factors
- Diffuse alopecias from endocrine disorders, such as diabetes mellitus
- Diffuse alopecias from drugs and chemical substances, such as antipsychotic drugs
- Diffuse alopecias from eating and metabolic disorders, such as iron deficiency
7. Traumatic Alopecias