The redness of the scalp may be caused by seborrheic dermatitis, contact dermatitis, eczema and other diseases.
1. Seborrheic dermatitis of the scalp: If the scalp is infected with Malassezia or more oil, it is easy to induce seborrheic dermatitis of the scalp, resulting in a patch of red scalp, greasy hair, dandruff and other symptoms.
2. Contact dermatitis: If the scalp is exposed to irritating and toxic substances and allergens, it may lead to the destruction of the skin barrier of the scalp and damage to the local mucosal tissues, inducing contact dermatitis, which will make the patient’s scalp red, accompanied by itching.
3. Eczema: If you are in a humid environment for a long time or your own immune system disorders, it is easy to induce eczema, resulting in a piece of the patient’s scalp red, may also be accompanied by scalp itching, pimples and other symptoms.
There are many reasons for the redness of the scalp, and it is recommended that patients go to the hospital to find the cause of the disease.