Hello, I'm new and am hoping I posted in the right forum, but I have an issue and I'm wondering if I need to see a doctor (its not an injury). I know that when people curl dumbbells for biceps, they usually have a "good" arm and a "weaker" arm, and I think that definitely applies to me, but this is really weird. The issue is, when I'm bicep curling with dumbbells, I can easily lift the weight with my left arm, but I can barely lift it with my right arm (I am currently at 30 lbs.). I took 10 lbs. off of the dumbbell to see if my right arm could tolerate 20 lbs. and it felt like doing the 30 lbs. with my left arm. So there's a 10 lb. difference in strength with my left to right arm? I can understand a 5 lb. but this is weird. I want to know if it is an issue I need to discuss with a doctor or if I just need to stop curling with my left arm for a while and concentrate on my right. Thank you all in advance for any advice you all can give.