1, shape: milk coffee spots are usually round or oval, while coffee spots are mostly irregular shapes, such as round, oval and so on.

2, color: the color of milk coffee spots is usually light brown, tan or dark brown, while the color of coffee spots is usually brown and brown patches.

3, etiology: milk coffee spots are mostly caused by sunlight exposure, trauma, infection and other reasons, while coffee spots are mostly caused by genetic factors.

4, treatment: milk coffee spots and coffee spots can be treated by laser therapy, cryotherapy and other ways.