Verified treatment outcome for Migraine Duration at Foundation Family Chiropractic - Summerville in Summerville, SC.Migraine duration reduced 91% — from 10 hours per episode to less than 1 hour achieved over Ongoing care. Diagnosis: G43.909 (Migraine, unspecified, not intractable, without status migrainosus). Patient experience: My migraines used to last 10 hours. Now they're under an hour when they happen. 91% shorter..