BMI serious question

Thank you all for your useful replies I really appreciate it! Yes I do lift a lot, I exercise in the morning a little bit, 1.5 hs at noon and on Saturdays and some Sundays too mostly weight lifting etc. I do have to drink and eat or I won't have any strength and I work full time so it's hard not to eat or eat very little (mind I do eat less calories than I ought to). I know it's mostly water and now not only my arms and pecs are bigger but my waist is smaller, and I can finally see my abs and I've lost most of my muffin top. I was happy after losing 90 lbs and gaining some makes me so mad and sad... but I guess that's what happens when you lift and get muscle. When I was just running it was easier to lose weight and I was eating less. Now if I don't eat enough I actually do not have the energy to lift and squat etc (also pull ups). I'd also love to eat during the day but can't, can only eat at around 6 pm. Next month I am going to eat more during the day and my plan is to exercise much more (with weights and dumbells and at the gym mostly, some cardio too) but I'm pretty sure that, because I'll be eating more carbs and exercise more muscle, I'll gain even more weight and, alas, become overweight, much to my dismay. That's crazy though, I had almost no muscle left after the 90 lbs loss and had a muffin top, no abs, and belly. Now I gained weight and I can show abs and every muscle is bigger and my tummy is flat, obliques are slim etc. Should I starve myself just to stay within the normal BMI range or not? What do you think?

Thanks again in advance!

No I wouldn't worry. It just looks at overall weight and doesn't take other factors into account ie how ,much body fat you have. Many professional athletes would be classed as obese on the BMI scale,

Wow That's impressive!

Thank you all for all your helpful replies, much appreciated Yes my waist is way smaller, my tummy flat, my shoulders and chest broader and arms bigger. I try not to eat carbs (just a tiny bit a day) and lots of protein and veggies stayin well under the 1200 kcal per day although I exercise a lot. But I keep getting weaker. I do assume some sort of fat in terms of olive oil in the salad. Should I start eating more carbs and get more calories? Again, I exercise a lot and push through thirst, hunger and pain, but sometimes it's very hard because I don't eat anything during the day, drink little and mostly at 6 pm and eat only some chicken breast, salad (with just some olive oil), a little piece of bread, steamed broccoli and basically nothing else. I'm guessing that, between work and exercising I'm in constant calory deficit and I have been for several months now. What do you recommend?

So, in order to bulk up even more I should eat more and avoid watching the scale for a while and not care for the BMI? Even if I pass the overweight limit? The thing is, I want to get bigger and more shredded and at the same time I don't want to be overweight... it's a crappy dilemma because I know I need to eat more and I know that if I ate any less I'd pass out (it happened to me before a couple of times for not eating enough and dehydration). That's another thing, I drink way too little during the day, just past afternoon and still not so much, like maybe 1L of water a day.

So, in order to bulk up even more I should eat more and avoid watching the scale for a while and not care for the BMI? Even if I pass the overweight limit? The thing is, I want to get bigger and more shredded and at the same time I don't want to be overweight... it's a crappy dilemma because I know I need to eat more and I know that if I ate any less I'd pass out (it happened to me before a couple of times for not eating enough and dehydration). That's another thing, I drink way too little during the day, just past afternoon and still not so much, like maybe 1L of water a day.

Ignore the weight and BMI numbers. They do not apply to weightlifters.
Work it out somehow to drink a little more than a liter a day.

Gotcha, so should I just avoid the scale and keep working out, running and exercise and drink more? After being VERY overweight, you know, I'm worried about going back to the 'overweight' side, after so much effort, but I guess if it's muscle and being much fitter I'll give it a go

Dude - what you are explaining about yourself is disordered eating on the way to an eating disorder. I am a 5'6" woman who is eating around 1880 calories and I exercise way less than you do. And I'm losing weight. You are going to hurt yourself with how you are eating. It's VERY unhealthy.

http://www.myfitnesspal.com/topics/show/1080242-a-guide-to-get-you-started-on-your-path-to-sexypants
http://www.myfitnesspal.com/topics/show/680246-tdee-bmr-what-they-are-and-what-to-do-with-them

Read these.

There's no doubt it's unhealthy, I've known that for a couple of months now. I did have an actual eating disorder (can't discuss it here, it's unpleasant), now it's better. I've been told that because of my little eating and drinking for so long my body is clinging to what it's got and I'd be happy to eat more calories but... how? I mean should I eat more carbs or more fatty foods? My body is so used to so little that I don't know if I can take it right away. Although I could lose weight this way, I don't really know. And, like I said, I am now muscular (not super muscular, but muscular) and I want to be MORE muscular and more shredded, which means (and I don't know) that I'll lose or gain weight. All I know is that after months of running I lost weight, after a few months of running AND weight lifting and bodybuilding exercising I gained weight but my chest is bigger and waist and belly smaller. I just don't get it although the muscle to fat comparison picture makes perfect sense.