Carboxy therapy can treat various cosmetic ailments from stretch marks to dark under eye circles, to cellulite and skin irregularities from residual fat deposits post liposuction. Carboxy therapy works on the idea that by infiltrating an area with CO2, the body will counteract by sending more oxygen to that particular area. The process of sending more oxygen to specific areas helps to eliminate built up fluid and waste between cells, improving discoloration and smoothing contours.