Red nipple like growth on inner thigh? tryed to pop it but only a light red liquid came out. can feel the knot under skin. now the size of a nickel.

Blood Blister: Without a photo would be difficult to determine. Unlikely a skin cancer. See your local dermatologist or family doc to evaluate.

Angiomas: Cherry angiomas are the most common vascular lesions to appear on human skin. They are made up of clusters of dilated capillaries on the surface of the skin, which accounts for the cherry-red or purple color. No one knows exactly what causes them.