Common causes of sudden hair loss include ringworm of the head, androgenetic alopecia, spot baldness and resting hair loss.
1. Tinea capitis: Tinea capitis is caused by dermatophytes infecting the scalp and hair. Common dermatophytes include Microsporum canis, Microsporum gypsum, Trichophyton mentagrophytes, Trichophyton xylanicum and so on, which manifests itself in symptoms such as hair breakage, thinning of hair, lack of luster, darkening of hair color, itching and so on.
2. Androgenetic alopecia: this disease is mainly related to genetic factors, androgen levels and other factors, mainly manifested as progressive hair thinning, shedding, thinning and other symptoms.
3. Spot baldness: the cause of this disease is unknown, which may be related to heredity, autoimmune, neuropsychiatric, infection, allergy and other factors, manifested as loose hair, easy to pull off, hair loss spots and other symptoms.
4. Resting alopecia: this disease can be caused by endocrine changes, nutritional factors, drug factors, physical stress conditions and other factors, manifested as diffuse hair loss, patients found in combing or shampooing hair loss increased.
It is recommended that patients according to their own situation, go to a regular hospital, after a clear diagnosis, active treatment, to avoid delaying the condition.