Moles, also known as nevi, are flat or raised bumps that are very common and can develop on the back of the neck. Some people may have 10–40 moles on their skin. If a person notices a mole ...

Some men have little bumps on their scrotum, and they're concerned. What is this? Could it be cancer? First of all, any time you want to know could something be cancer, you need to see a doctor.