New Delhi, Feb. 17 -- Menstrual cups, a reusable alternative to period products like tampons and sanitary pads, have become quite popular over the past years. You just have to insert the small, flexible, bell-shaped cup into your vagina and it collects all the period blood. These cups which are usually made of medical-grade silicone or rubber can hold the fluid until they are emptied. You just have to follow simple steps to use this period product the right way. However, you may experience menstrual cup dangers if you don't insert it properly. One of the problems is that it may block your urine flow and have a negative impact on your kidneys, medically known as ureterohydronephrosis.

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