Exercise helps us maintain healthy body weight while the skin receives a good dose of oxygenated blood. The increase in blood circulation helps in making the skin look healthy and vibrant. Exercise dilates skin pores, allowing sweat to expel trapped dirt, oil and toxins. The sweat glands increase their function in getting rid of skin toxins. All this sounds great until you get a less desirable side effect; post-workout skin breakouts on your face, chest, back and even thighs. And no, sweat is not the culprit; whatever comes into contact with sweat is. Here is what dermatologists recommend.