the sacral chakra relates to your emotions so they are probably interlinked. Iyengar yoga is very precise and works great on specific problems. I am not sure where you are from but if you want to find a teacher in your area... you just need to google... BKS Iyengar Association of whichever country your in. and there is usually a list of qualified teachers.
this is the official site for the uk.
Roxy x
