'It's honestly hell.' Hospitals see rare vomiting syndrome in heavy marijuana consumers.

Since recreational marijuana became legal in Massachusetts three years ago, hospitals have noticed more cases of a rare illness afflicting a small portion of heavy cannabis consumers. The condition, called cannabinoid hyperemesis syndrome, can be horrific for patients, causing intense abdominal pain, nausea, and days-long vomiting episodes that are strangely relieved by hot showers or baths.