Stress is the most common migraine trigger. And regular breathing exercises can help reduce stress and anxiety in a matter of minutes. Deep, slow diaphragmatic breathing stimulates the parasympathetic nervous system, which relaxes the mind and helps alleviate pain. Try breathing in and out through the nose for a count of 10 to relieve headaches and migraines. A visualization exercise where you imagine inhaling relaxation and exhaling pain and stress with every breath may also help.
You can find many pain-relieving breath exercises on Breath Hub.