Hair pain isn’t just the result of under-washing or overstyling, it’s something that happens to two thirds of those who suffer from migraine headaches, too. In this case, the phenomenon is referred to as allodynia, and it comes from the repeated firing of nerve cells in the brain that are involved in the process of a migraine. “Allodynia is not limited to the scalp, but refers to increased sensitivity to pain from a non-painful stimulation like a light tapping or a light touch,” explains Dr. Fusco. “Individuals with migraines may experience the sensation that a mere wind blowing, a hat, or a light touch to the scalp elicits pain.” For this, doctors recommend taking migraine medication as soon as you feel a migraine coming on and before the onset of allodynia.