Itchy scalp with yellow discharge may be seborrheic dermatitis, tinea capitis, scalp folliculitis, as well as contact dermatitis and other causes. 1. Seborrheic dermatitis: the etiology of seborrheic dermatitis is not clear, and it is considered to be related to heredity, microbial infection, neurological dysfunction, immune dysfunction and other factors. Patients will manifest as scalp erythema, attached greasy flaking, itching, etc., thus patients will manifest as scalp itching with yellow secretion. 2. Ringworm of the head: ringworm of the head, especially yellow ringworm, pustular ringworm, patients will appear around the hair follicles yellow ringworm scabs, and will be accompanied by itching, scalp scales and other manifestations. Therefore, patients with tinea capitis will have symptoms of itchy scalp with yellow secretion. 3. scalp folliculitis: scalp folliculitis may be caused by staphylococcus aureus, dermatophyte infection. Patients will appear in the hair follicle red pimples, itching and other manifestations, the top of the pimples will be pus, pus points will appear after the breakthrough of yellow-white pus, so the patient will be manifested as scalp itching with yellow secretion. 4. Other: patients with scalp contact dermatitis, eczema secondary infection, will also be manifested as scalp itching with yellow secretion. It is recommended that patients with itchy scalp with yellow discharge performance, need to consult a doctor in time, the doctor will choose the appropriate measures for the cause of treatment.