Two of the most important factors for cancers of the head and neck are the use of tobacco, (whether cigarettes or smokeless), and alcohol. Patients who use both alcohol and tobacco are at even greater risk of developing this type of cancer than those who do either alone. In fact, researchers believe this combination accounts for about 75% of all diagnoses. https://cancercarenews.com/ccn-blog/head-neck-cancers-reducing-risk/