The cause of itchy large pores on the face may be due to physiological reasons or seborrheic dermatitis. 1. Physiological reasons: many people’s skin is prone to oil, the oil secreted by the pores can not be discharged, blocked to the mouth of the hair follicle, which is manifested as enlarged pores. At the same time with itching may be the cause of dry skin dehydration caused by the skin barrier damage. At this time, the skin is easy to sensitive, produce itching. 2. Seborrheic dermatitis: After the skin oil secretion exuberance blocked pores, at the same time by the Malassezia infection can trigger an inflammatory reaction, become seborrheic dermatitis, at this time there will be large pores itchy phenomenon. The phenomenon of large itchy pores on the face, please go to the hospital in time to check, clear the cause of the disease, under the guidance of the doctor targeted treatment.