Carboxy injections for fat breakdown combined with exellis. What are the side effects? is it safe?

I had one treatment of carboxy injections administered to my abdomen after having exelis done, for fat breakdown. Now I have firm lumps under the skin, without bruising at the injection sites. Those areas are also sensitive to pressure (hurts a little). Has anyone had this experience & should I wait for it to go away or seek medical attention?

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