Excision of a lesion on the lip is a surgical procedure in which an abnormal growth or lesion on the lip is removed. Lesions on the lip can vary widely, including benign growths like cysts, moles, or warts, as well as potentially cancerous lesions like squamous cell carcinoma or basal cell carcinoma. The goal of excision is to remove the lesion completely, preventing further growth or complications, while also maintaining the function and appearance of the lip.