Gums white like rotten may be caused by gingivitis, apical periodontitis, periodontal abscess, etc. Patients can use medication, or incision and drainage or open pulp drainage treatment. Gums white like rotten, generally due to the inflammation of the gums gradually aggravated caused by ulceration, or apical periodontitis aggravated caused by gingival fistula, may also be a periodontal abscess led to the swelling of the gums white. If the patient has a systemic infection, the first thing to do is to control the infection, can follow the doctor’s instructions to use metronidazole, tinidazole, ceftazidime, ceftriaxone and other drugs. If there is localized inflammation, 1%~3% hydrogen peroxide solution can be used to flush the gingival sulcus to control the inflammation. If there is pus formation, incision and drainage of pus or open pulp drainage can be carried out. Daily attention should be paid to maintain oral hygiene, when there are symptoms of inflammation, timely medical treatment without delay, so as to avoid more serious symptoms.