Welcome to Health Care Magic
You injected cocaine in vein two times and it appeared collapse and you have numbness
in arm. Yes even with single wrong injection it can happen. You have probably developed thrombophlebitis
in vein and it caused collapse of vein and rigid vein. Due to chronic intravenous drug abuse
it can occur. Cocaine is a drug of abuse, you should try to cut down this habit. Various treatment programs are there to treat cocaine addiction.
For your vein you can apply ice on affected part.
Secondly apply Thrombophobe cream on vein which will help to delay inflammation.
Don't try to inject in same vein again.
Thanks Take Care
Dr. Seikhoo Bishnoi