Vikings’ beat writer Chip Scoggins writes that receiver Percy Harvin collapsed at the team’s facility today at practice and was taken to the hospital in an ambulance.

Harvin, who has suffered from severe migraines, was not on the field for the start of practice. He was seen talking to head athletic trainer Eric Sugarman outside the locker room at Winter Park and then jogged onto the field to watch practice. A few minutes later, Harvin vomited and then fell to the ground.

He came out for special teams practice and started having problems when he looked into sky catching punt.

Vikings coach Brad Childress on Harvin’s migraines: “That one hit and it hit hard. Always scary for all of our guys when you see teammates struggling.”

The Vikings ended practice early and even held a team prayer, so the situation is obviously serious. Harvin missed the last two weeks of camp due to migraines and more than likely, this episode had something to do with his headaches.

Migraine sufferers are often sensitive to light and sound. The headaches can also cause nausea, vomiting and sometimes affect the person’s vision. As a frequent migraine sufferer myself, I know first hand that they can be crippling and I hope that Harvin is okay.

One of the bad things about migraines is that they’re incredibly hard to predict. You can avoid triggers like certain foods and drinks, but they can often come on due to strenuous activity or even a change in weather. This isn’t like when you break a bone and you know it’ll heel in 6-8 weeks. The Vikings can’t assume that Harvin will be ready to play in a couple of days, as he could have another attack at any time. (He missed the Vikings’ win over the Bengals last year due to migraines, as well as some practice time during the playoffs.)

Again, hopefully he’s okay and he’ll be able to continue everyday activities soon.