Stress is one of the largest contributors to someone experiencing an acne breakout. When you are tired and stressed your skin is one of the first things to suffer. Many skin experts claim that exercise will help rid the skin of acne however, sweat can cause new breakouts in addition to potentially making current acne problem worse then they were before you started exercising. Yoga can help you by increasing the blood flow to your face. It helps in flushing away the toxins and provides nutrients to your skin. It is important to avoid constipation to keep the metabolism in the correct working condition. To get the best results along with it, you will have to alter your eating habits. Yoga suggests the use of healthy spices like turmeric and coriander which are natural antibiotics, rather than chili powder, which can cause burning in the stomach.
if you are suffering from acne, you must practice yoga for an hour daily. your session should include standing forward, bending postures and inverted posutures followed by ten minutes of deep relaxation in supine posture. understanding the concept of yoga will help you move towards a balance functioning of mind which paves the way of production of healthy chemicals, disruption of which is the root cause of acne.
source:
http://www.10acne.com/acne_treatment_article6.html
http://www.acnetalks.com/pimple/Acne-Treatment/Alternative/Yoga-Is-One-Of-The-Diverse-Ways-To-Fight-Acne.htm