What Must I Do About Yellow Discoloration And Swelling In The Wrist After Injecting Methamphetamine In The Arm?

I shot up meth ne near my arm and wrist it is now swollen yellow looking and I can hear something in my hand I don t know if it s a tendon like moving around in there like we can hear it grinding. And I can t grip anything with my hand and it s excruciating pain now after 3 days and it s going down but looking lumpy