Can endometriosis be cured?

Managed. Cured might be a stretch. It can be surgicaly treated and removed, and medically managed. With treatment, the symptoms can be minimized or eliminated.
Controversial. Proper surgical resection of endometriosis, which requires an expert surgeon with specialized training, can go a long way towards ongoing relief from endometriosis. I believe (based on good data and theory) that the disease can be permanently removed. That does not mean, however, that the pain that results may not linger at least somewhat. Pain is a lot more than just some inflamed tissue.
Sometimes. Endometriosis is a progressive condition. This means that it tries to grow or come back, even after effective treatment with surgery or medication. Fortunately, it typically stops progression after menopause or removal of both ovaries.

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Can regular exercise cure endometriosis? If yes then how

Not cure but. It may help reduce the prominence of your symptoms due to alterations in estrogen levels, natural endorphins, improved pain tolerance, and other factors too. Read more...