Cankles is a slang term combining "calf" and "ankles" used to describe the area where the calf meets the ankle without a clearly defined taper or contour. This results in the ankle appearing thick or merging with the calf, lacking the usual narrowing between the two. Cankles can be a natural body type or caused by fat accumulation, fluid retention (swelling), genetics, pregnancy, or other medical conditions. They are not a medical diagnosis, and if caused by swelling, the underlying reason may need medical attention. For many people, cankles are simply a cosmetic concern rather than a health problem.