I agree with Dr Ethan that it is important to see your dermatologist/doctor if there is a change in mole size and texture.
This is particularly so if there is a sudden and rapid increase in the size of the mole. Bleeding, irregular borders and uneven colour of the mole are other features that warrant attention.
Mole cancer, also known as melanoma, is the most dangerous type of skin cancer as it can often spread or metastasize to other sites. Early diagnosis significantly improves the prognosis. So if in doubt, see your doctor early.