If you are sensitive to the sun, wear UVA/UVB sunscreen and a hat when you are outdoors to protect against the scorching sun. Quit smoking. You can apply cortisone ointment which improves the lesions and slows the progression of the disease. However, a cortisone injection is a good alternative to the ointment since it is more effective. Visit your doctor every six months for examination and to minimize scarring and damage to your internal organs.