One side of body getting smaller than other?

[LittleMonster]

Over the past 4 years or so, I have noticed my body becoming imbalanced more and more. My left leg is beggining to get a little smaller than my right, and my right upper body area(forearm, bicep, shoulder, lat) is getting a little smaller than my left. Its really ****ed up because whenever I workout with weights or when I go on the Stair Mill or Versa Climber, the sides that are bigger, acutally feel like their getting bigger because they are getting a much more intense pump. I am almost positive its not nerve damage. I have no tingly feeling or numbness anywhere and I am not losing strength, just size(not a **** ton of size like atrophy, but enough to notice). My buddy who is in Physical Therapy school says that my muscles are just not activating. Why, I don't know. He thinks its because I do alot of boxing and I am constantly using my left to throw jabs and my right leg to push off. Thus, my left arm and right leg beggining to get bigger. Anyone have any thoughts? Thanks.

[flangmasterj]

Is one side getting smaller or one side getting bigger?

[LittleMonster]

My bad. I made that a little confusing, sorry. No, one side is becoming smaller. The sides that are becoming smaller are just not getting a pump in them like they used to. I mean, you can really notice it at the end of a workout. The one side is pumped like crazy and the other is just kind of firm, but you can really notice the size difference then.

[crossus]

My guess would be as long it's not some medical condition it must have some thing to do with your activities /boxing?/ ,im not a MD or anything but I think you need to pay more attention to the less active side to balance things out ,wear some weight straps /leg and arm/ for few weeks that could work,im not sure what else would.