Visceral fat can cause this (especially in men), but it’s usually a side-effect of being overweight and it sounds like you describe yourself as looking ‘malnourished’. www.webmd.com/diet/what-is-visceral-fat
There is at least one type of malnutrition, “Kwashiorkor”, caused by protein deficiency that can cause something like this also. my.clevelandclinic.org/…/23099-kwashiorkor
But, disclaimer, I am not a doctor, so best advice is to get checked out by your healthcare provider.