I am 12 days post surgery of a partial knee
Can be due to clot formation or lack of exercise.
Thanks for posting your query.
12 days after the surgery usually the stitches heal but the swelling can take a few weeks to subside. You can start with non weight bearing exercises to reduce the chances of clot formation. The raise rash needs a direct examination t fin the cause. This can be related to allergic rash.
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Wishing you good health.
Dr. Praveen Tayal.