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Scientists, from the University College London, have proved that a hot water bottle on the tummy can ease period pain.
The research, led by Dr Brian King, found that heat provided relief from internal pains, such as cystitis and period cramps, for up to an hour.
"The pain of colic, cystitis and period pain is caused by a temporary reduction in blood flow to, or over-distension of hollow organs such as the bowel or uterus, causing local tissue damage and activating pain receptors," Dr King said.
"The heat doesn't just provide comfort and have a placebo effect; it actually deactivates the pain at a molecular level in much the same way as pharmaceutical painkillers work”.
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