A wheal with a bit of yellow skin is when the wheal is mature enough to be considered for pus drainage based on the skin manifestations. Wheat grain swelling is also known as blepharitis, mainly due to inflammation, the early manifestation of redness, swelling, pain and burning, usually onset of about 3 ~ 5 days, the wound site will appear yellowish-white pus, which indicates that the wheat grain swelling has matured, at this time you can go to the hospital, by the doctor to the pus incision pus drainage treatment. After the pus discharge treatment, pay attention to keep the wound area dry and clean. The granuloma has a bit of yellow skin, you can relieve the pain by applying cold compresses, if the granuloma can not be relieved in a short period of time, you should go to the hospital in time for treatment.