Yeah I do them all in my stomach but I think you can do them in your thigh as well...but I'm not brave enough! I have much more spare fat on my stomach!! They can bruise pretty bad occasionally though! Dr M put me on them because my blood is slightly thicker than normal and I also have an NK cell imbalance I think......its all pretty confusing what drugs I am taking for what, but it worked so I am rolling with it!!