A lot of bodybuilders have to deal with this....not all but enough.
Low sodium is the culprit. I used to get them so bad back in the day I can remember laying in the floor with tears in my eyes, I'm talking full body cramps. Not always full body, but I do remember a few times having bi's, tri's, lats, pecs, hams and abs all cramp up at once...talk about misery.
Ab cramps were the worst for me....it got so bad once during a contest diet it made me throw up. Talk about excruciating...your ab muscles are cramping and you're vomiting...that's no fun for anyone.
It's not that surprising though that this happens to a lot of bodybuilders simply because most don't get enough sodium. Further, so many are petrified of sodium thanks to internet message board bro-science. Sodium is vastly important.
Anyway, I got to where I was having to salt a lot of my food and even take sodium capsules at one point to fix the problem. At first I started taking more potassium like a dumbass thinking this would fix it...I didn't know any better at the time....but I was only throwing my electrolytes more out of balance.
As for what aesthetics said....most all steroids block glucocorticoid hormones....for the most part this can be a positive trait but things can get out of line if you're not careful. However, I'm not sure how HCG would help with this situation.....care to elaborate?