Hi, i would like to know whether yoga exercise wou

Sat Nam,

The practice of pranayam, or breathing exercises, will improve the balance of the nervous system and the oxigenation of the body.  This, along with the exercises and a balanced diet, will help reduce pimples and will make your skin fresh and radiant.

Here is some information about breathing exercises and diet.

http://s3cr3ty0stg2.wpengine.com/breathing/long-deep-breathing.html

http://s3cr3ty0stg2.wpengine.com/breathing/breath-of-fire.html

http://s3cr3ty0stg2.wpengine.com/yoga-articles/advice-for-good-nutrition.html

Blessings