This can lead to shortness of breath, as well as possible chest pain, depending on the cause of the effusion. Fever is another possible finding, but is also related to the cause of the effusion. ... Read more
Re: can benzoyl perioxide permanently damage skin??? Yes, BP can cause a dermatitis (permanent skin damage). I had problems with BP, I used it for the spots, but when I applied it my skin went red (it like burned...)on the spots I had applied the BP. I personally don't like BP at all.
Damage to the external layer of keratin can cause skin, hair, and nails to look unhealthy or flaky. Hair and nails on humans especially tend to become dry and brittle, because the dead keratin is being pushed to great lengths.