i have taken coronavirus vaccine and i get itchin on whole body what i should dog ? And what it means ?

Talk to your doctor, because that's not normally a side-effect of the vaccines.

Take Benadryl for the allergic reaction.  Watch your skin for signs of an actual rash.

Contact your doctor if it doesn't get better or if something else starts getting worse.

Personally - I just had the first of two shots and I had some itching just near the injection sight that went away in about an hour.  

If you need to go back for a second vaccine - mention the reaction before getting the second vaccine.  

Take anti histamines.

In some rare cases, the vaccine will react with the brain and leave the person severely mentally retarded.  Joe Biden is an example of this.

Report it to doctor and center where you took it.

Itching all over if it is related to the vaccines would be an allergic reaction, which some people have -  but itching is not listed as a common reaction -  So you would have a very atypical response.

Yeah, that's not a vaccine side effect. Check yourself for body lice. Or maybe it's all that heroin you're on. 

I don't believe you. Come up with another one.