You might think it strange that fabric or clothing could cause acne - but this about it in this way. Say you have a helmet that you wear for 12 hours straight on a bike trip, and that there's a chin strap on it. Say that chin strap covers up 10 pores on yo...
When you think of pollution, you tend to think of giant black smokestacks belching out giant clouds of black smoke. However, in our modern world, pollution comes in many forms. Try buying an air filter for your bedroom sometime, and run it for a few weeks....
To understand acne and pimples, you have to understand skin. Below I've done a rather crude (grin) drawing of a cross section of skin. To the left is an oil gland and to the right is a hair follicle. Your skin has an incredibly important function. It keeps...