Hello, Thank you for your question. Vascular disease can occur in patient with lupus(SLE). Your symptom with small circular dark black spot on the inside part of the base of your thumb, we called Raynaud Phenomenon. Which is a vasospastic process induced by cold or emotion that occur in up to 50 percent of patients with SLE. Or other abnormality vascular in SLE. Lupus can cause damage in many different parts of the body, including blood clots in arteries of veins of the legs, lungs, brain, or intestines, inflammation of the blood vessels. and other organ affected. There is no cure for lupus. The goal of treatment is to control symptoms. severe symptoms that involve the heart, lungs, kidney, vascular, and other organs often need treatment from specialists. Each person with lupus need evaluation regarding: How active the disease is, what part of the body is affected, what form of treatment is needed. There is concerning with the changing of your finger color skin. You should go to see you doctor to see and reevaluation your symptom. It is important to wear protective clothing, sunglasses, and sunscreen when in the sun. Get preventive heart care, stay up to date with immunizations, avoid tobacco and drink minimal amount of alcohol. Hope I have answer your query. Let me know if I can assist you further. Best regards, Dr. Heang Chan Raksmey, General and Family Physician.