I can't help you out, but I would just like to say I wish I had your problem, haha. You probably see it different then I, but I would love to be called a twig, people are probably just trying to get a rise out of you anyway. At least you get to eat what ever you want and not have to worry about getting fat. But if I was in your position I would just up my calorie intake a 1000 and get a weight bench, get some muscle on there and it knock your weight up quick.

Well I am a boy >_<
And the promblem is that Im not tall enuff =/
And weight lifting stunts ur growth...so...=/ Yeah

All you need to do is to find a diet that supports weight gain. You'll find plenty of those online.

___________________
Heidi

genetics,

what is the stature of your parents. You will grow.

High protein weight gain through a nutritional formular may help. hard work, muscle building. Pressups etc. Have you ever had your thyroid level tested. my husband is amazing how he can fluctuate, extreemly high metabolism, he eats like a horse yet can remain thin. He has stabalised now that he is getting the correct thyroxine.

You are 14, you are too young to be worrying about your weight. Don't go taking weight gaining supplements or weight training like these people are telling you too. Your body is going through a lot of changes, you won't really know what is going to happen, you might hit a growth spurt and become 5'9, which does happen, or your metabolism may decrease later on, who knows =/. You are lightweight as you said, but you don't want to mess with heavy weight training just yet, you may injure your growth plates. If you must do weights, then I suggest finding somebody older then yourself who is experienced in weight training and makes sure you have the proper form and technique. Don't go heavy on the weights like a lot of junior high/high school idiots who obviously aren't that strong but decides to show off to their friends or a girl near by, by attempting to do 45 plates on bench press when you can't -_-. Don't do much cardiovascular/long lasting physical activities too, if you decide to weight train. The best thing I would just suggest for you is to eat more meals. Eat 5 times instead of your usual 3, but don't bloat yourself at each meal. Just eat enough to last you a few hours, and eat again then. It will cause your metabolism to increase (which I know you don't want), but if you eat significantly more amount during those meals, the slightly increased metabolism won't compare with the calorie intake and you can gain weight thusly. So just make sure you eat healthily and get your nutritional needs for now. When you are 16-18, and you are still skinny (chances are, you will still be skinny), and you have enough experience knowing how things are done in the gym, then start going after the weight lifting.

On a side note, you could listen to what roxy stated about having your thyroid level tested. Chances are, your thyroid level may be perfectly fine, but just in case. The Thyroid gland excretes hormones that have to do with metabolism, a hypoactive or hyperactive (in your case it would be hyperactive), could lead to an increase in metabolism. Don't get your hopes up though, it isn't as if every other kid on the block may have thyroid level imbalances. You will probably have to gain weight the hard way =/

I am 20 years old and have a hard time keeping up 105lbs i have to stuff myself everytime i eat to stay at 105 i eat alot and my family their all small too but i am still smaller than everyone my dad told someone he thought i was on drugs before and never would even think about anything of that sort i want to gain weight not lose it but im too thin and i need help what should i do....
also i have went to the doctor for help and they didn't know what to tell me my thyroid is fine and my metabalisiom isnt even that fast its fast but not faster than my bigger sister

ive been trying for years to no avail!