<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, my skin on my arm looks infected and theres fluid retention. I also noticed a skin lesion and Ive been having a decreased appetite. My skin just looks abnormal. What could be the problem?  <response>: Based on your symptoms, you may have an infection of an open wound. It is important to clean the wound regularly to avoid further complications. Ill prescribe some antibiotics for you to take. 