Loose skin after baby

I'm 16 months post pardum and still have some loose skin on my lower stomach. I have an ALLLLMOOOST flat stomach it's just that pesky loose skin that makes me look like I have a pudge. Does anyone know how to get rid of that? Wraps, spa treatment, waist training, or nothing really? I'm small 5'2 and 100 pounds and have always been very skinny so that little pudge really makes me insecure. Suggestions?