Can a leaky gut cause migraines? These studies suggest that people who get frequent headaches may be predisposed to gastrointestinal problems. Digestive conditions, such as irritable bowel syndrome and celiac disease, also may be linked to migraines. Treating these digestive conditions may help reduce the frequency and severity of migraines.
Can gut bacteria cause migraines? An increasing number of gastrointestinal disorders have been linked to the occurrence of migraine suggesting that gut microbiota might play a pivotal role in migraine through the gut–brain axis.
Can an unhealthy gut cause migraines? To date, several researches have shown that migraine is associated with some gastrointestinal (GI) disorders such as Helicobacter pylori (HP) infection, irritable bowel syndrome (IBS), and celiac disease (CD).
Can probiotics stop migraines? , demonstrated an approximately 40% reduction in migraine frequency in the probiotic groups. In their study of EM patients, Martami et al.  saw a reduction in migraine frequency of 2.6 days per month compared to placebo.