<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have a lump on my finger and theres an abnormal-looking skin over it. Also, I have some skin moles on my hand. What could be causing this?  <response>: Based on your symptoms, it seems like you might have a sebaceous cyst. Its a small, benign cyst filled with keratin that can appear on different parts of the body, including hands or fingers. Would you like me to take a closer look and confirm the diagnosis? 