How long does it take for a patient to heal from a fire boil depends on the patient’s own healing ability, the extent of the local infection and the severity of the infection. A. If the patient’s fire boil infection is relatively mild, the local scope is limited, and there is no large amount of fluid and pus accumulation, and the patient’s own healing ability is strong. In a week after the surgical drainage, the local exudate can be completely absorbed, and the boil can be completely healed with good results in about two weeks. Secondly, if the patient’s fire boil is larger in size, the local infection is more serious, and the scope is more extensive or there is more fluid and pus in the fire boil, and the patient is old and weak, the patient’s own healing ability is not good, so the recovery time of the patient is significantly longer after the open drainage. It usually takes 4 weeks for the inflammation of the wound to improve gradually through active anti-infection and strengthening local drug exchange treatment.