###Human: Is unhealed mouth sore the first sign of oral cancer? ###Assistant: Hi. I have gone through the images (attachment removed to protect patient identity). It looks like a well indurated mucosal ulcer. Being oral cancer is unlikely. Please mention about your habits regarding tobacco chewing or any other habit. Generally, oral ulcer takes three to four weeks to get healed. It depends on the cause. There are multiple causes such as vitamin deficiency, iron deficiency, viral and other immunocompromised diseases. Do CBC (complete blood count), VDRL (venereal disease research laboratory test), vitamin B12, and folic acid. Revert me with the reports. Continue using an antifungal mouth rinse, use Orajel (Benzocaine) and take B complex tablets daily for 15 days.