Sclerotherapy is not advised in the following cases- Probability of a coronary bypass in the futureDeep vein thrombosis- This is a condition in which blood clots develop in the deep veins of the legs. You will not be eligible for sclerotherapy if you have an active deep vein blood clot.Pregnant and breastfeeding women are not allowed to undergo this procedure.Sclerotherapy is not recommended if you are bedridden.