I have a shoulder problem which pains me severely when i swing it hardly. how do i make it go?

Shoulder issue: If you are having that much difficulty would consult with an orthopedist who can deterime the cause and treat it.

Rotator cuff: Start with some easy exercises to work the muscles of the shoulder blade that the rotator cuff attaches to. This will take some of the strain off the cuff. Use a rag and wipe a surface in the numbers of a clock face from the center up to 12:00 then back to center then 1:00 and so on. Start on a flat table top and gradually work your way up to a mirror or other vertical surface.