Hair grows a lot of dandruff, may be related to cleaning is not in place, may also be due to seborrheic dermatitis, ringworm and other reasons caused. 1. Cleaning is not in place: If you don’t wash your hair regularly, wash your hair without rinsing the shampoo clean, or use shampoo products of inferior quality, it may lead to a lot of dandruff. 2. Seborrheic dermatitis: Seborrheic dermatitis is induced by long-term mental stress, exuberant secretion of androgens, and dysfunction of the immune system, leading to excess oil secreted by the sebaceous glands, resulting in the epidermal cells renewing and metabolizing at a faster rate, which may result in a lot of dandruff in the hair. 3. Tinea capitis: the disease is usually caused by fungal infection of the scalp, fungi triggered by scalp inflammation, may cause a lot of dandruff, usually accompanied by hair loss and other symptoms. Hair long a lot of dandruff, may also be caused by other reasons, if accompanied by obvious symptoms of discomfort, should be as early as possible to consult a doctor, after a clear diagnosis of the cause, by the doctor’s guidance for treatment.