Is severe itching a common side effect of ramipril and if so what should I do if I am affected?

No. It is not a common side effect. Nonetheless you could be allergic. If you've just started ramipril, you should stop it and discuss this with the prescriber. If you've been on it for a few weeks or longer, it's very unlikely to be related.
Call your doctor. You may be experiencing side effects of your medication. Call your doctor.