Swollen gums odor is generally considered to be chronic gingivitis, periodontitis, periodontal abscess, the specific cause of the disease should go to the local medical institutions to find out. 1. Poor oral hygiene conditions will lead to food debris gathered plaque attached, and over time the formation of dental calculus, dental calculus contains a large number of bacteria for a long time accumulation will produce odor. This situation can generally be treated with scaling. 2. When the systemic resistance to decline age increase, attached to the gums under the plaque formation, can develop into periodontitis. Periodontitis can lead to deepening of periodontal pockets, loss of attachment, redness and swelling of the gums, and odor in the mouth. This type of situation should be carried out in a timely manner periodontal scraping, and to maintain healthy oral hygiene. 3. Periodontal abscess is a limited purulent inflammation of the wall of the periodontal pocket or deep periodontal tissue, which is actually a complication of periodontitis. It is generally an acute process, and can develop into a chronic periodontal abscess if it is prolonged or recurrent. This type of situation should be first periodontal scraping, oral anti-inflammatory drugs such as amoxicillin, metronidazole and so on. There may be other causes of swollen and smelly gums, which should be investigated at a local institution for specific treatment, and the medications mentioned above should be taken on medical advice.