According to blackamericaweb:
Tyrese, who’s been busy promoting his newly released album “Open Invitation”, was rushed to the hospital last night for what is believed to be exhaustion.
He later tweeted from his bed in the emergency room for his fans to pray for him.
This is not the first time Tyrese was rushed to the hospital. Two years ago, he took himself to the hospital due to sharp pains in his head
Tyrese talks Transformers: Dark of the Moon
Released (DVD-Blu ray) September 30, 2011