Ulcers arise from a break in the continuity of the mucous membrane of the mouth. As the mouth is full of germs, the ulcers soon get infected and swell up, causing pain. Ulcers may arise from various causes. Stress due to lack of sleep, over-work, eating certain kinds of foods, hormonal changes, lack of nutrients (e.g. vitamins, minerals, anti-oxidants), viral infection (e.g. herpes, hand, foot & mouth disease, chickenpox, HIV), immune disorders, Crohn’s disease, cancer, and injury, can give rise to ulcers. Sometimes, the cause is unknown. You should see your dentist if your ulcer does not heal in two weeks. Lack of attention on the mouth during chewing can result in cheek or lip biting, leading to ulcers.
Ulcers can arise from traumatic inattentive tooth-brushing. Ulcer medication like corticosteroids can be applied on the ulcer to help it to heal rapidly. A mouth-rinse will help to reduce the amount of germs in the mouth, and reduce bacterial infection of the ulcer.