If you notice symptoms or signs of lip cancer, it is important to consult a doctor immediately. Your physician will thoroughly examine the affected area. During the examination, information regarding your personal health history, smoking and alcohol consumption habits, previous dental treatments, family medical history, and current medications will be gathered. In cases where lip cancer is suspected, a biopsy may be performed. This procedure involves taking a small tissue sample from the suspicious area, which is then examined in a pathology laboratory. If the biopsy results confirm a diagnosis of lip cancer, your doctor may request additional tests to determine if the cancer has spread to other parts of the body. These tests may include magnetic resonance imaging (MRI), computed tomography (CT) scan, complete blood count (CBC), positron emission tomography (PET/CT), and chest X-ray. Following the definitive diagnosis, a treatment plan will be devised.