Can I make my chest flat by exercising and losing weight?

Losing weight definitely can make your chest smaller, though it isn't guaranteed to work, and it won't make your chest flat. Given that your chest is small to begin with, it's probably less likely to work, but it's worth a try. Worst thing that can happen is that it doesn't work but you still get some healthy eating and exercise

 

I believe the blockers will do the main work. You may want to check how they can influence your weight though.
Excercising probably won't work and yes, anorectic women don't have a big chest...
Your body is going through a lot with the puberty and blockers, be nice to it. Eat healthy. As far as I know any kind of hormones can influence your weight (both ways), so ask your doctor what you can expect.

 

If you are pre-puberty (and since you are on blockers then you will remain pre-puberty) then you probably haven't developed much actual breast tissue. If your chest is mostly fat deposits, which sounds likely, then yeah diet and exercise would help the same as it does with removing fat anywhere else on your body.

Definitely talk to your doctor though because if it is breast tissue then exercise and diet won't have much of an impact.

You could also try building up your pectoral muscles (they are the big chest muscles). They will make the chest and upper body area bigger and broader, but at the same time they will flatten it out. Pushups are an easy exercise that will target your pectorals.

 

I'm "skinny fat" (slim, but have a high body fat percentage) so I'm trying to lose a bit of weight and gain a ton of muslce. I'm around an A/B cup. It also depends on your breast density. Lower density breasts are mostly comprised of fat, which are easier to lose than higher density breast which are mostly comprised of tissue which can only be removed through surgery.

I'd say workout if you want, but lose slowly or else the skin will be super loose and you'll just have empty skin sacks instead of a flat chest. Also building up the arms can make your breast look smaller.

 

Loose skin isn't much of issue when you are young because your skin is still very elastic and will shrink (and stretch) without too much trouble. Unless you are losing a LOT of weight, or are significantly older, like 35+, then you don't really have to worry about loose skin.

Really good point about building up your arms (and shoulders!) to make your chest look smaller in comparison though, that is definitely a good idea.

 

The only way to measure the density of your chest is through a mammogram. I'm just assuming mine is mostly fat because I've gained 20 pounds and went up 2 cup sizes because of it. I figure if I lose 20-25 pounds I'll go back down to a AA. It's all a guessing game though unfortunately. You can always ask your doc about it.

 

Ah okay. As PotatoSmuggler said it is individual so you can't really tell unless you do a proper examination (like a mammogram). However two years of development generally won't be much, especially since you say it is relatively small already, and if you have fat deposits elsewhere on your body it's very likely you'll have a similar amount on your chest.