The number of people being diagnosed with mouth cancer (oral cancer) is increasing, with notable rises in incidence in younger people and in females. There are certain lifestyle habits that can increase the risk of mouth cancer, such as smoking or chewing tobacco, drinking alcohol above recommended levels (especially in those who also smoke), and chewing betel nut (areca nut). Infection with human papillomavirus (HPV) increases the risk of some types of mouth cancer, and too much sun exposure may also raise the risk of lip cancers. The signs and symptoms of mouth cancer can often be seen or felt, and any red or white patch, ulcer or lump can be an early sign if it lasts for three or more weeks. If people notice any of these changes, they should seek help from their dentist, doctor, or another healthcare professional without delay, because if mouth cancer is diagnosed at an early stage, when the lesions are small, treatment is generally less complicated and more effective.