Tomcat cheeks are caused by testosterone, fighting, and scar tissue in unneutered male cats. Swollen cat cheeks can also indicate health issues like abscesses, dental disease, or tumors. Trap-Neuter-Release (TNR) helps reduce overpopulation and improves the health and lifespan of stray cats. Chunky, squishy, and oh-so-pinchable, there's nothing cuter than cat cheeks. Some breeds, like the Siamese, have lean faces while others, like the British shorthair, have rounder facial features.