My skin feels like something is crawling my toungue itches and my private area what can this be?

Itching allergy? The problem with this forum is that it may delay people like you from seeking medical attention. Much more information is needed. You may have a serious allergy to something, could be a medication, food, yeast. If you recently started a new medication i would be worried about an early drug reaction. Talk with your md asap.
Itching. There are a wide variety of things that can cause generalized whole body itching. You should see your doctor and have some simple blood tests like a complete blood count, basic metabolic profile, liver function tests including gall bladder evaluation, and maybe a thyroid test.