My mum has capsulitis and bursitis of her shoulder joint and had previously been taking ibuprofen and paracetamol at regular intervals everyday until she had a cortisone injection into the joint 3 weeks ago. She had noticed that one foot started to swell and for no apparent reason. She asked the doctor about it and she didn't seem concerned. Now since the injection has taken the pain away, she no longer takes painkillers and we have also noticed that the foot doesn't swell anymore so we were wondering if some painkillers can cause swelling?