Raised rash on both ankles. Ankels and feet very swollen. First rash was itchy now low grade pain in joints. Post operative 8 weeks r rotator cuff.?

Lymphedema . Stasis dermatitis and lymphedema is characterized by swelling in the legs and a red rash. There are several possible causes. Evaluation by a physician is recommended.
See your doctor. This could a number of different, but your need to see your doctor to have this evaluated soon.
See a derm. This can represent an inflammation in your blood vessels called vasculitis. It is important to be checked as soon as you can by a dermatologist. There are other possibilities as well but given the proximity to having had surgery it is important to be seen for a thorough evaluation.