Brown raised patches on the face are not necessarily cancerous and can be caused by age spots, common warts, etc. Brown raised patches on the face can be caused by many reasons, such as age spots, common warts, etc. They are not necessarily cancerous. You need to go to dermatology department for examination and treatment according to the situation. 1. Age spots: mostly seen in middle-aged and elderly people over 40 years old, is the most common benign skin tumor. It can be manifested as brown or black plaques on the face and hands, which are usually hairy, with different shapes, sizes and colors. The old age spots may not be treated, or removed by laser, freezing and so on. 2. Common warts: These are benign skin growths caused by human papilloma virus infection and can be single or multiple. They can be removed by laser, freezing and topical medication. 3. Skin cancer: generally grows faster, and clinically manifests itself in various forms, some are nodular, papillary or cauliflower-like, and some are wart-like, with the common characteristics of easy to form ulcers, and irregular shape with raised edges. Once diagnosed, skin cancer needs early treatment. To sum up, brown raised plaque on the face is not necessarily cancerous, but if the brown raised plaque on the face becomes bigger in a short time, accompanied by bleeding, itching and other abnormalities, it is necessary to consult a doctor in time, complete the examination to exclude the possibility of malignant changes, and standardize the treatment under the guidance of the doctor.