Slight false hope
As adviced by Dr Anuar , I took Arcoxia for 3 consecutive days and two days later I reported to the physiotherapist that the pain level, at its worst, had dropped dramatically from 5 to 2. We both hoped that this was a permanent improvement, rather than lingering effect of the painkilling effect of Arcoxia. Well, unfortunately, it wasn't permanent but it wasn't all bad news either: a few days later, the pain level increased but only to 3. Bear in mind that I hadn't really tested by lifting heavy stuff because I'm not supposed to do that and so I don't really know how much more painful it will be. I should bring this up to the therapist next time. Meanwhile, the soreness of doing the hand exercise reappeared. Sometimes I had to stop midway during exercise to rest for half a minute because it was becoming painful. Applying Polar Frost on those areas helped quite a bit. I still avoid swimming but I'm so tempted to try it once......