Common oral diseases include caries, periodontitis, pulpitis, etc. The symptoms include tooth loss, gum swelling and pain, tooth pain, etc., as follows. 1. Caries: usually manifested as dental defects, but also due to staining leading to tooth discoloration, when the caries is deeper, there is food or cold water into the hole will cause tooth pain. 2. Periodontitis: usually leads to red and swollen gums, soft texture, there may be bleeding after probing or spontaneous bleeding, and in severe cases, periodontal abscesses, loose teeth and other symptoms. 3. Pulpitis: spontaneous pain in the teeth, hot and cold stimuli can cause or aggravate the pain, usually developed from caries. There are a variety of other diseases in the oral cavity, if discomfort occurs, it is recommended to go to the hospital in a timely manner, with the help of the doctor to clarify the cause of the disease after targeted treatment.