cramp

Stomach cramp is weird, you'd think that the medical world would know exactly what causes it and have a fix, but no. Lucky enough it doesn't affect me, but the main things you should do immeadiately is
Leave 2 hours between eating and running and don't fill your stomach with water beforehand (hydrate while running by sipping)
Stretch beforehand
Deep breathing
But for a longer term fix, apparently it may be associated with low potassium (eat more bananas) or electrolyte imbalances, so look to replace these. Also yuo should strengthen your core through exercise, which can be a pain in a different way :)
Main thing I would say,is to leave plenty of time since eating. One of the best things about running is to come home , shower and launch into a decent feed, so try and do it that way. Eat lighter during the day.