The symptoms that you are complaining about appear to be due to stiffness
due to prolonged immobilisation. The best type of treatment for such a case will be physiotherapy
in the form of active , active assist and passive range of motions of the fingers. Xray of the involved hand will be further helpful in making sure that there are no bony deformities. Multiple choices for pain relief include analgesics, wax therapy and hydrotherapy
. As for the hydrocele
it requires a proper examination by general surgeon
who will help you decide further. Hope this answer has helped you.