Gums sometimes bleed when sucking consider trauma, gingivitis, periodontitis, cavities and other causes. 1. Trauma: If you eat some relatively sharp food, such as bones, etc., or toothpicks, etc., puncture the gums, will make the gums appear transient bleeding. 2. Gingivitis: when plaque and other factors lead to inflammation of the gum tissue, the patient will appear in the gums sometimes bleeding when sucking, the patient will feel the root of the tooth localized swelling and discomfort and other symptoms. 3. Periodontitis: the disease is mainly caused by plaque, trauma, systemic susceptibility factors, patients will appear in the gums sometimes bleeding when sucking, accompanied by gum edema, pus and other symptoms. 4. Cavities: Gums sometimes bleed when sucking may be caused by caries, teeth connection relationship is poor, resulting in food residues in the teeth, resulting in gums are compressed, resulting in bleeding gums. It is recommended that patients go to the regular hospital in a timely manner, under the diagnosis of the doctor, according to the patient’s specific condition, to take targeted treatment, life should pay attention to oral hygiene, the temperature is too high or too low food with caution.