The first part of your query has been answered at this link:

http://www.yogawiz.com/askquestion/20/
yoga-asanas-for-thick-hair-are-there-any-yoga-pose.html

For the answer to the second part of your query, regarding skin care I suggest you do all the yogasanas, breathing and cleansing techniques and follow a Yoga diet. You’re bound to get much more help at these links:

http://www.yogawiz.com/yoga-poses/yoga-asanas.html
http://www.yogawiz.com/breathing-exercises.html
http://www.yogawiz.com/cleansing-techniques.html
http://www.yogawiz.com/yoga-diet.html

For more specific details on a healthy complexion, please click here:

http://www.yogawiz.com/health-issues-and-yoga/yoga-poses-for-healthy-complexion.html