Daily marijuana use linked to increased risk of deadly head and neck cancers, study finds

Using marijuana daily for years may raise the overall risk of head and neck cancers, according to a new study that analyzed millions of medical records. People with a cannabis use disorder are significantly more likely to develop head and neck cancers compared to those who do not use cannabis. Cannabis use disorder is diagnosed when a person shows symptoms such as craving weed, tolerance to its effects, and withdrawal. The study does not find an association between occasional recreational use of marijuana and head and neck cancer. Tobacco use and alcohol are the most common causes of head and neck cancers, while viruses like HPV and EBV also contribute. The way marijuana is smoked and the presence of various cannabinoids in the plant could contribute to tumor growth. With the increasing use and acceptance of marijuana, it is important to inform people about potential risks and conduct further research on its impact on cancer development.