Yellow gums can be caused by hyperpigmentation or by dental calculus. 1. Hyperpigmentation: long-term smoking, often drink coffee, tea, cola and other colored beverages of the population, are prone to gingival hyperpigmentation, which is gradually manifested as yellow gums. 2. Dental calculus: mostly caused by not paying attention to oral hygiene, the oral cavity after the decomposition of food residues and bacteria in the oral cavity can form plaque, if not cleaned up in a timely manner, you can continue to accumulate, calcification, and ultimately the formation of dental calculus, which is mainly manifested in the gums edge of the tartar, usually in yellow or brownish-black. Patients with yellow gums, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to identify the cause of the disease, and if necessary, to carry out the appropriate treatment.