Ive had this problem for about 8 years. I am a very trim person, (5'11" 135 lbs) very active, and this seems to be ruining my life. Since middle school, my abs havnt been flat (of note, i should have a 6 or 8 pack) but yet it is not fat either. I find myself being anorexic so i can go on living what seems a normal life, being the thin active person people have always assumed I am. I can suck my stomach in so i have a flat stomach, which i have been doing for all these years. Recently, past 4 years or so, ive had severe gas issues, and wondered if anybody else has heard of this? Im just looking for some place to start, so i can figure out whats going on. Thanks so much.