Mouth ulcers are not related to syphilis. Mouth ulcers involve the breakdown of mucous membrane tissues inside the mouth, which can appear as one or several ulcerative lesions, sometimes showing a milky-white appearance, along with possible milky-white peeling. Therefore, they are not connected to syphilis, and patients are advised not to worry excessively. Syphilis is a sexually transmitted disease that can cause ulceration throughout the body. Mouth ulcers generally occur due to internal heat or a weakened immune system in the affected individual. If a patient frequently experiences mouth ulcers, it is advisable to visit a hospital to rule out other systemic diseases. Additionally, it is important to consider whether these could be related to a deficiency in certain vitamins, so patients are advised not to be overly anxious.