Skin Lesions can include moles, cysts, warts or skin tags. Most are benign but are sometimes removed if they are painful, unsightly or restrict movement. Surgical removal is the most common treatment for most skin lesions. Warts may also be removed by being frozen off using liquid gas or treated using a chemical paint, some may even be burned off. If suspected of being malignant, a biopsy is taken and analysed in a laboratory for any signs of cancerous cells.