Hi my ovarian cyst size is 6.8 cm in size.kindly suggest is it possible to cure by nonsugical.?

Depends: Your cyst can be followed if it's a simple cyst without any features that are worrisome for malignancy. If there are multiple septations, thickened membranes, nodules, irregular sides, etc; you should have a surgical procedure to rule out pre-malignant or malignant tissue. Also, this size can occasionally torse (twist) & can cause severe pain. Talk to your doc re: your cysts characteristics.