To determine if it is oral cancer, one can visit the dentistry department of a formal hospital for an oral examination and a local pathological biopsy. If cancer cells are found, it can be diagnosed as oral cancer. Additionally, CT scans and MRI can be performed to determine the location and size of the lesion. The onset of oral cancer generally starts with oral ulcers. If an oral ulcer persists and does not heal for more than two weeks, and the affected area shows cauliflower-like protrusions, hardening at the base, palpable lymph nodes, pain or exacerbation, and it affects eating and speech causing some obstacles or changes, early surgical treatment should be sought after the detection of oral cancer. Immediate radical surgery should be undertaken. If surgery is not possible, treatment through radiation or chemotherapy to reduce the tumor size before proceeding with surgical excision is recommended.