Rapper YUNG JOC Is Having 'HAIR ISSUES' . . . He Went To A HOT CLUB . . . And Ended Up SWEATING OUT HIS PERM!!!

Rapper Yung Joc from LOVE & HIP HOP was extremely proud of his new RELAXED hairstyle. But this weekend, he ran into some trouble. The air conditioning system was malfunctioning in the club - and the heat and humidity frizzed up his hair.

That crazy hairstyle is for an upcoming role . . . but it seems Joc is really digging it outside of the cameras.