What causes tender in the finger tips and swelling?

Could be circulation: Some people, in particular can get what is ka raynauds disease which is a decrease in ciuculation to the skin esp hands/finger tips. Two types primary and secondary. Primary is caused by vasospasm, secondary has underlying causes i.e. Lupus, rheumatoid arthritis, scleroderma etc etc. You should see you pcp to be properly diagnosed and treated.