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:
- Genetic
- Psychological
- Immunological
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
- Menopause
- Pregnancy
- Childbirth
- Strict diets
- Postoperative stress
- Anemia
- Problems of the thyroid gland
- Chronic diseases (lupus erythematosus, liver / kidney problems)
- Heavy metal poisoning
- Immunizations
- 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