Testicular Cancer. I am an RN nurse. This is how I know.
If it's a firm lump behind your left testicle, it's cancer. If it's not, it's nothing. Your testes should be relatively firm with some give. Each testicle will be a slightly different shape or size and this applies to firmness too. However, if you still have any concerns, see a doctor.
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 is probably the vein
a testicle
go see your doctor, ASAP.
Yes.
Some testicle problems, like infections and swelling, are treated with antibiotics like Vibrox. See the link below.
Yes.
yes you should be concerned wth just a lump above your belly button. so go to the doctor and get it looked at.
If this is something new, it should be looked at. It could just be a syst or an ingrown hair or as serious as cancer. Better to find out one way or the other.
You could have sciatica. You should see a doctor for the correct diagnosis and treatment.
It could just be a swollen lymph-node.