Yes, it's true. Bikram Yoga is one of the most therapeutic forms of hatha yoga available today. It's also a very vigorous style of yoga, and that means you need to give your body time to heal internally if you've had major surgery. Please do not rush back into the room! Use common sense along with your doctor's guidance. And make sure your doctor understands just how vigorous Bikram Yoga is before talking him or her into giving you a release....
I know you're anxious to get started again, but be mindful; and be kind to your body. A good rule of thumb regarding surgery is to give yourself at least 8 weeks to heal before taking class. If you've had something like a hip replacement done, give yourself 6 months. And straight from Bikram's mouth, "take it easy, honey" when you come back. Do not push yourself! Remember there are five aspects of mind that Bikram Yoga bestows, not four: They are, "Faith, Self-control, Determination, Concentration, and PATIENCE!" For goodness sake.... Please, practice patience.
I am in Utah right now, and from my balcony I have the enormous pleasure and blessing of seeing this gorgeous creature at least once a day. So I started thinking about how wise the ancient sages were when they named many of the postures after animals, making them so easy to remember. It's not as if the yogi's of old were able to walk around with a stack of books and photos under their arm. They didn't shclepp a copy of of their favorite yoga tome up to the cave in the mountains.... they needed to have an internal way to easily remember and access the information they needed, so naming postures after animals was a brilliant idea!

Peace of mind, equipoise, steadiness.... these are the mental and emotional benefits of practicing Bikram Yoga.... Like Bikram says, "Let no one steal your peace. Otherwise he is the winner and you are the loser." Peace stealers include the media, the people that you work with, your family, your friends, the environment, other drivers, other yogis, your own inner enemies.... The list is endless. 
Comments
Doing yoga every other day has helped a lot more than the physical therapy that I was prescribed, and it doesn't hurt as much. Getting mobility back can take a long time, but I am being patient!
Some procedures ar so minor, no interruption in the "rotuine" is required. Also, most doctors are clueless as to what a Bikram class involves! If you say, "Doc when can I do yoga again?" to most doctors, the response is likely, "Well, that's not too vigorous, so maybe a couple of weeks, maybe four depending on how you feel." It is important to be specific: "Can I do extreme forward bends, back bends, spinal twisting, and balancing on one leg in a 90+ F degree room for 90 minutes?" This would not only stop most docs in their tracks, it would give them pause as to their "routine" post-operative recommendations.
and have your dentist's okay before taking class again.