Girls shouldn't do certain things while she is menstruating - Giving women time
The first sanitary pads were invented in the year 1896, while commercial painkillers like Meftal were not available before the 20th century. Before that, the five stressful days of menstruation which entail cramps and pain for many women were dealt with Indian medicines. Probably women did not work during those days because of discomfort and slowly this became a ritual and degraded to the form of a superstition.
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