You may have what's called a vericose vien or a vericose seal. It kinda feels like bag of worms with some really thick, or wide strands. It normally has something to do with the blood vessels but it's essentially harmless. You should only be concerned if it hurts you or causes any discomfort. I'd still go get it checked out by a doctor, chances are that during a normal physical, he'll catch it.
Information on this site is provided for informational purposes only.
It is not meant to substitute for medical advice provided by your physician or other medical professional.
If you have or suspect that you have a medical problem, promptly contact your physician or health care provider.