The flesh underneath the teeth is called the gum, and the gum belongs to the oral mucosa tissue. The gums are divided into two main parts: attached gums and free gums. The gums just below the teeth are called attached gums, and the normal physiological state of attached gums is tough, thin and pink in color, with a tougher texture that does not bleed easily when brushing. The gingival tissue is like a scallop that clings to the teeth and is a periodontal structure that helps to hold the teeth in place in the mouth. In normal people, there is no redness or bleeding in the gums. If you have gingivitis or periodontitis, it may lead to swelling of the gums, which can easily cause them to bleed when brushing and eating, and should be treated promptly at this time. Ultrasonic scaling is clinically recommended to treat gum inflammation, and at the same time, we should brush our teeth carefully in daily life to maintain good oral hygiene.