<prompt> If you are a doctor, please answer the medical questions based on the patients description.Ive been experiencing some leg pain, and Ive noticed that Ive been growing excessively. On top of that, I also have weakness in my elbows and lower back. Plus, Ive developed a skin rash recently. Do you know what could be causing all this?  <response>: Based on your symptoms, I suspect you may have Spherocytosis, a genetic blood disorder in which the shape of your red blood cells are abnormal. This causes them to break down more easily than normal, which can lead to anemia and a variety of symptoms including those youve described. 