Either sharp, migraine-like pain – or dull aching.
As with belly pain – the sharp, stabbing is due to Stuck Blood and the dull, achy is due to lack of the raw ingredients needed to run the body.
In either case, good production and circulation of Qi and Blood (as in being vibrantly well) would mean there was no pain or life disruption with periods.
Severe head pain – need more water, magnesium and rest from inner stress.
See Stuck Liver Blood./Stuck Liver Qi