How Can Hand Swelling With Slight Bleeding Be Treated?

This bug bit me and now my hand is swollen. At first i thought it was a mosquito but it didn't look like one...and it wasn't even itchy! at first there was just blood and then there was a little swollen part around it and then the next day the back of my hand is all swollen! My right hand looks completely different from my left hand! How do I cure this? And get rid of my swollen hand! Please Help! Thanks!