White patches in the mouth, also known as oral leukoplakia, are a common condition that can be caused by a variety of factors, including smoking, tobacco use, alcohol consumption, and certain medical conditions. While most white patches are benign, some can be precancerous, so it is important to see a dentist if you develop any white patches in your mouth.
Your dentist will be able to examine the white patches and determine if they are cancerous or not. If the white patches are cancerous, your dentist will likely recommend removing them. There are a variety of ways to remove white patches, including surgery, laser therapy, and cryosurgery.