For those stressed people who are not entirely obese or overweight but are still striving to drop some fat off, the reason, probably, is belly fat. The latter, in contrast to our liking, has a nagging habit of creeping into our lives without us getting a hint. Unsurprisingly, this leads to an unpleasant, sagging belly on an otherwise proportionate body. Naturally, nobody wants one particular body part tarnishing an otherwise perfect outlook! When we come to the causes, however, it seems rather troubling how one specific part of the body is affected, leaving the rest intact. What causes belly fat?