Red and swollen gums can be divided into various cases, which can generally be classified as simple redness and long-term redness as well as recurrent redness. Generally, red and swollen gums are mostly caused by gastritis or fatigue, while long-term redness is mostly caused by periodontitis and recurrent redness may be caused by conditions such as loose teeth. The most common type of red and swollen gums are those caused by gingivitis or even periodontitis due to plaque buildup, which results in red, swollen, and floppy gums that do not fit closely to the tooth surface. In Chinese medicine, patients with problems such as gastritis are often accompanied by red and swollen gums, mainly due to fire caused by excessive stomach fire. Most of the long-term redness and swelling of the gums is caused by periodontitis, and often these patients have red and swollen gums along with bad breath or pain, which cannot be relieved by rinsing the mouth. Most of the reasons for recurrent gum redness and swelling are related to loose teeth, which is also a manifestation of osteoporosis, the main reason for redness and swelling due to loose teeth is the local inflammation formed by the unstable alveolar bone, which leads to recurrent redness, patients with loose teeth need to treat the inflammation in addition to appropriate calcium supplements, keep exercising and knocking properly to help restore the teeth to health. When the gums are red and swollen, it is best to consult a doctor in a timely manner and carry out the relevant treatment after the doctor has confirmed the diagnosis to avoid loosening or loss of teeth, as well as pay attention to dental checkups every six months or once a year.