Rochelle Collins, DO, is a board-certified family medicine physician and assistant clinical professor of family medicine at Quinnipiac University. Discharge from your belly button might be a sign of ...

Colleen Murphy is a senior editor at Health. She has extensive experience with interviewing healthcare providers, deciphering medical research, and writing and editing health articles in an ...

I had one removed from my head when I was about eight-years-old and didn't have another until two years ago. Now I have three that have come up on my head beneath my hair.

Nucleotide excision repair is a process that repairs damage to one strand of the DNA, particularly from UV irradiation, which distorts the DNA helix. The DNA flanking the damage site is cleaved to ...

Base excision repair is a process that removes and replaces damaged or misincorporated bases in one strand of the DNA that may generate mutations if left unrepaired. The damaged base is modified and ...