Constant itching in the pubic hair area can be caused by pubic lice, eczema, scabies and other diseases, which can be treated by washing the affected area and applying medication externally, depending on the cause. 1. Pubic lice: Constant itching in the pubic hair area can occur when pubic lice are parasitized in the pubic hair area. The patient should remove the pubic hair in order to use topical insecticidal drugs, such as 10% sulfur ointment. If the patient is pregnant or has localized skin breakage, it is not possible to use topical insecticidal ointment, you can apply petroleum jelly on the itchy area to relieve the symptoms, and pay attention to disinfect the underwear. 2. Eczema: If the itchy area is accompanied by polymorphic erythema or papules, it may be vulvar eczema. In acute stage, patients can use zinc oxide cream to smear the itchy area, in subacute stage, patients can use glucocorticoid cream to smear, and in chronic stage, patients can use sodium clofenac ointment. Patients should pay attention to, change and wash underwear, do not scratch, do not use soap and water to wash the vulva. 3. Scabies: Vulvar area with scabies can also manifest as a persistent itch, and will have an eczema-like appearance. It should be noted that scabies is highly contagious, so patients should apply 10% sulfur ointment to the affected area, and the treatment cycle should be 1~2 weeks. Patients can also use medications such as salicylic acid ointment. Personal hygiene should be observed during treatment. Patients with persistent itching in the pubic hair area should go to the hospital in a timely manner to clarify the cause of the disease, standardized treatment by the doctor, the use of drugs need to follow the doctor’s instructions, so as not to delay the condition.