So I'm 18 and I've had this problem since I were about 4. I guess it started as me having a really hard stool to pass, and when I would go it would hurt. So I began holding it whenever my body got the urge to go. I read that that is common in young children, but I'm an adult now and I'm still doing it! I can usually hold it for quite awhile [few months], but when I do finally go, the stool is large, hard, and dry. I feel like I am literally going thru labor trying to pass it and there is usually blood involved. If I hold it long enough, it tends to fill up my tummy. I don't get hungry becuz I feel full all the time. When I was 12, I held it in for about a year and a half. No I take that back, I would sometimes go, but not enough to feel relieved. Well, becuz I kept holding it in, I was feeling full and would hardly ever ate. So I lost over 50lbs in 6 months. It was a big achievement going from 180 to 124. I went from overweight to underweight becuz I was constantly losing it. At the time I didn't have a very good doctor; my mom would take me to see him and she would let him know her concern about my weight and eating habits. All he said was that I'm going thru puberty, my body is changing, if I didn't want to eat don't force me to. So they didn't, and I kept losing the weight. At first my family was applauding me for my efforts of getting the weight off, but then they begin saying I looked sick and that something is wrong. I'm a light-skinned biracial female, but my skin began to look pale/grey. My hair began to thin, my eczema got even worse, my lips were constantly chapped, and I was always tired. Again I visited my doctor and he said the same thing. This went on for awhile, but then one day I went out to eat with my family and I guess the food was bad. When I arrived home, I began vomiting and passing BMs constantly. After about 2 days, it stopped and I was soo hungry. I ate and ate and ate, I gained all my weight back, and some extra. Throughout gaining my weight back, I was still holding my BMs. It wasn't purposely, it comes second nature to me now. I've been on many different medications and I even recieved an enema, but nothing helps. Lately, I've been very sick and noticed that I've been dropping pounds. My skins looks really dark and dry and i feel like my hair is falling out. I'm afraid that maybe what happened before is happening again, but it could be worse since I'm older. Any suggestions? I'm getting bulges in my sides and back and I've been skipping meals. I'm at my wits-end.. =/