Increased dandruff with itching
There is usually no obvious inflammation, and it is considered as a mild manifestation of seborrheic dermatitis if:
Scaly type, that is, scalp erythema or red papules with small pieces of desquamation, flaky gray pityriasis, dry, soft, sparse or shedding hair.
The scab type, that is, the scalp is thick and flaky with greasy scabs and map spots, is generally considered to be a serious manifestation of seborrheic dermatitis.
Excessive dandruff caused by contact allergens such as shampoo and hair care products is often accompanied by redness, papules and papules. In severe cases, blisters and scabs may appear, and skin lesions are usually localized, which may be contact dermatitis.
What environmental factors may be related to excessive dandruff?
A large number of microorganisms, mainly bacteria and fungi, are colonized in normal scalp, including Staphylococcus, Propionibacterium and Malassezia, among which Malassezia can produce inflammatory molecules such as irritating unsaturated fatty acids through metabolism, which may cause scalp inflammation and lead to excessive dandruff.
Excessive exposure of the scalp to the sun, dust in the air, or dry climate caused by seasonal changes may affect the water-oil balance of the skin and lead to excessive dandruff.
What lifestyles may be related to excessive dandruff?
Excessive showering or shampooing, as well as frequent combing of hair will stimulate the scalp, leading to excessive dandruff.
Bad lifestyles, such as smoking and staying up late, will lead to personal stress and immunosuppression, aggravate seborrheic dermatitis, and show excessive dandruff.
Rich and spicy diet and insufficient intake of fruits and vegetables may aggravate seborrheic dermatitis and lead to vitamin B deficiency, which in turn affects scalp health and leads to excessive dandruff.