The main cause of separation of gums and teeth is inflammation of the gums and loss of attachment, which is commonly seen in gingivitis or periodontitis. 1. Gingivitis: Gingivitis is induced when poor oral hygiene leads to the deposition of plaque, calculus and soft tartar near the gingival margins of the teeth. Typical symptoms of gingivitis are bleeding gums, itchy and swollen gums, gums become hypertrophic due to swelling, crimson or dark red, soft and easy to bleed, severe gingival hyperplasia, gingival papillae are bulging, and teeth completely separated. 2. Periodontitis: If gingivitis cannot be treated in time, it can gradually develop into periodontitis, which will eventually lead to loose teeth. Due to the swelling of the gums, the gingival sulcus deepens to form deep periodontal pockets, the self-cleaning effect is poor, the pockets are easy to hide food debris, leading to bacterial growth, inflammation aggravation, and in severe cases, there will be pus overflow. Formation of separation of the gums and teeth. If the body’s resistance is lowered, single or multiple gum abscesses may occur, stimulating the gums to bleed, swelling, and triggering symptoms such as bad breath. Therefore, in case of separation of gums and teeth it is recommended to go to the hospital stomatology department in time for effective treatment.