Hidden soreness in the lower gums is usually caused by gum injury, but it can also be caused by gingivitis, periapical inflammation and so on. All of them need to go to the hospital in time for examination, and then intervene in time for treatment after clarifying the causes. 1. Gum injury: If you eat too hot food, or bone, fish splinter and so on caused by gum injury, it may cause pain. Usually, you can rinse your mouth with compound chlorhexidine gargle to prevent infection. In addition, for the broken part of the gums, you can also apply recombinant human epidermal growth factor gel to promote mucosal proliferation, which is conducive to the healing of the broken mucosa; 2. Gingivitis: it is usually a common cause of gum edge congestion, erosion, pain, mostly caused by poor oral hygiene, brushing is not serious, resulting in long-term embedded food, the formation of plaque and calculus, and stimulation of the gums caused by chronic inflammation. Generally, you have to go to the hospital for scaling and periodontal rinsing and medication and other treatments, so that the inflammation of the gums gradually dissipate, thus relieving the symptoms of pain. You can also use Guilin watermelon cream locally, or apply tretinoin oral ointment, which is conducive to gum recovery; 3. Periapical periodontitis: If the lower anterior teeth are chronically infected with pulp due to caries and other reasons, it can spread to the alveolar bone of the root tip, and channels for drainage of pus can appear at the gums, causing redness, swelling, and pain in the gums close to the tip of the root, which leads to the appearance of the pain in the lower gums. Treatment, mainly for root canal treatment, the root canal for repeated, adequate rinsing, generally after the inflammation is relieved, the pain in the gums can also be relieved. Do not self-medicate if your lower gums are sore, but seek medical attention as soon as possible to avoid complications. The medication should be prescribed by your doctor.