Tyrese was cornered in a courthouse hallway Thursday by 4 bailiffs who fully patted him down … this after Tyrese exhibited emotional/irrational behavior on video Wednesday.

Tyrese showed up at the downtown L.A. Courthouse for the custody case that has been going on for more than a week. His ex, NormaGibson, is trying to get a permanent restraining order against him which would block Tyrese from gaining custody of their 10-year-old daughter, Shayla.

We’re told the bailiffs — all of whom work for the L.A. County Sheriff’s Dept. — were concerned that Tyrese might actually bring a weapon to court, so he was pulled aside in the hallway and given the pat down.

Tyrese told the bailiffs, “Yes, I understand” when they told him they need to do the security check.

No weapons were found.

I really feel like he needs help! Not just a call and check on him but real life help !!