― Can You Get A Blood Clot From Doing HCG Injections? ∙ As with most diets there are side effects and dangers associated with doing the HCG Diet. Chances are you may have even heard of a few of them. ∙ Some of the more common side effects include things like constipation, dry skin, muscle weakness and even headaches. ∙ However, because there are different methods for doing the diet, there are also different dangers depending on which method you use. ∙ For instance if [...].