balls can be asymetrical... infact most of the human body isn't perfectly symetrical...
and you suffer from blueballs, it's common. it's like a cum-or-get-off-the-pot-syndrome where the arteries in your balls get bigger, making your balls swell up and get sore. cumming finally returns the arteries to their original size

all balls are like that lol :-D ! not the pain tho thats not normal just the one being bigger and one hanging down more part its how there ment to be

actually, over 95% of guys, the left testicle hangs lower than the right one. that is anatomically normal due to blood vessels formation and other things.
if actually the size of the testicle is bigger and the hurt ocasionally, you should go to an urologist. this is the doctor that should check you. does it hurt when you make efforts?? it could be a varicouse vein. is not a big problem, but very discomfortable; surgery is the definite solutio to it(you will keep your nut, don't worry!!). if something else, is better to get checked ASAP anyway.

forgot to tell you, if you fear cancer or something like that, then go to doctor ASAP. testicle cancer can spread very fast and things can be worse if you wait too long.

Go to the doctor immediately. i'm not kidding - and i hate doctors. it's ok to hang low, but if it hurts, that's not good

Ball cancer is possible but its more likely to be entangled veins (as someone else mentioned) which have always been there but become more obvious as you grow older.

Testicular cancer is very easy to treat and mostly not life threatening, so if it was this, dont worry to much.

GO TO YOUR DOC! Its awkward for both of you, but at the end of the day, the doc will admire your awareness, and your mind will be at rest.

Hey man that is really normal that shit happened to me twice. I know it sucks cuz you can barely walk cuz your balls are hyper sensitive....Anyway about one of your sacks hanger longer. THat's normal I think. Maybe your balls are al ittle too hot. I dont have that prblem though

There is nothing wrong with the ball size, but as far as the pain- it can be a passing issue that is no real problem or it can be a variety of other things that you should get checked for:

For example:

1. testicle cancer
2. your balls may be twisted...they are dangling on cords after all and you may need to move them around or massage them with your hands to help them feel good. I can do that for you, or even suck them if you like.

Your testicles are something you really don't want to risk. GET TO THE DOCTOR!

You have cancer... or a kidney stone. lol, my friend went through the same thing.

You cant walk but you can touch them? Get ya hand of it.

well not to be any way bad but how old are and just sayin you may have cancer in one of your nuts go see a doctor about .

you have to empty your sack, when you popped the pain from blueball goes away.
Maybe a good idea not to sit around with a hardon all day.. are you not frustrated out of your blueballed mind.?

Jerking off more getting rid of cum should help if you dont like jerking off maybe your girlfriend can let you get rid of your cum by having sex more times with you

if it feels like a small lump, you should get it checked out, it could be early signs of testicular cancer