No one has to read a study or a report to know that there are a lot of overweight or obese people in the USA and the UK. You can blame this on the food being sold or a lack of understanding, but the real bottom line is that you are the one who is putting that stuff into your mouth.
Most people do not think about it, but everyone has a choice whether to eat decent food or not. If you are radically overweight, then you chose to allow yourself to get yourself into that state. No one else, you!
Nevertheless, there is always a way out and it is never too late. There are thousands of weight loss programs, so you should be able to find one that suits you. I made that sound easy and it should be, but people still have trouble choosing one.
My advice is to read the weight loss advert aloud to yourself or a friend. Does it sound like BS? Then it probably is. Dump it. The bottom line is that you can only lose weight by expending more energy than you consume. Having said that there are a couple of ways of achieving that.
The two basic methods are either counting calories or counting carbohydrates, that is Weight Watchers or Atkins. Start by going to their web sites and reading about their philosophies. Pick the one that suits you and stick to it.
One note that I would like to stress here for teens is that at your time of life your body is going through a revolutionary change. You are metamorphosing from a child to an adult and your body is filling up with hormones, you only had a little of before.
Let the change finish, before you start worrying too much. You were a bug, now you are a chrysalis and soon you will be a butterfly. Just wait and your body time to sort itself out.
There really is not much you can do to stop what your body has to do. Spots mean that you have poisons in you and your body wants to get rid of them. Help it by not putting any more junk into it. Keep your skin clean and make sure that everything that touches your skin is clean too. Hands, hair, pillow cases, et cetera.
Exercise! Now is the time to embed an exercise routine into your way of life. Exercise raises your rate of metabolism which helps you burn calories more quickly. If you can burn calories quickly, then you can allow yourself more treats.
The other point about exercise is that if you do not establish a discipline for exercise when you are young, then you will find it harder when you have your next bodily change in your forties or fifties.
The bottom line is not to worry too much about what you look like now, you are a chrysalis. Help your body out by eating healthily and take up a sport you enjoy and stick to it.