Some days they are invisible and others, it looks like you could drive a small car through them.

We’re talking about your pores  here people. But is this just an illusion or do they really change sizes day to day?

It’s an illusion. The size of your pores are the size of your pores, period. However, they can become engorged with sebum (the oil your skin produces) and build up of dead skin cells.

Don’t know how it got started, but one of skin care’s most notorious urban legends is that rinsing your face with warm water “opens” pores and rinsing your face with cold water “closes” pores. Your pores are not like mini mouths that open and close. They are always open and the best way to keep them clear is to use a toner with hydroxy acid to exfoliate dead skin cells.