7Strong Smells
Many people would suffer from a cluster headache when they are exposed to strong smells from some substances, such as perfume, paint fumes, petrol, solvents, or bleach. Even when they are pleasant, many experts believe that these odors cause your blood vessels to dilate and swell. This stimulates the central nervous system in your brain to trigger some areas which are responsible for pain. In addition, the cluster headache might be an allergic response of your body to the triggers. Therefore, it is better to avoid those products, particularly during an attack of cluster headaches. [7]
