PeriodsEvidence check
What Makes Period Cramps Worse? Smoking, Stress and Sleep Studies
Painful periods run in families, but everyday factors seem to matter too. Pooling 24 studies with 27,091 women, smokers were about 1.45 times as likely to have painful periods as non-smokers. A review of 77 studies linked cramps with stress, sleeping under 7 hours, going to bed after 11 p.m. and being underweight. These are associations, not proof, but several are things you can change.











