Yes, you may have cancer?
Probably cancer...
It is normal for one testicle to be a little bit bigger than the other. This is no problem. If one is much bigger, or feels swollen, or has a lump on it, then you should see a doctor as soon as possible. See Related Links below.
Insect bite possibly. Allergy reaction? If you are concerned about it then you should consult a doctor asap.
As long as blood is pumping through the testicle then it should have a pulse, the left testicle should have a pulse too.
I think the doctors is the very next person you need to see, not a good idea to wait as your health is so very important.
It shouldn't be, the "testicle tubes" on either side should be the same.
If it is to swollen it might have an infection otherwise it should be fine
Any testicle problems should be taken to a doctor. There are many reasons for differences. See the link below.
A boy with an undescended testicle should be taken to a doctor as early as possible. See the link below.
There are many possible reasons for a lump on your testicle. You should see a doctor as soon as possible. See the link below.
It should not affect performance however may effect sperm count and reproductive capability.
Yes, it's not normal..