A head injury, which has been described as "swelling around the brain", has officially forced Ultimate Fighting Championship (UFC) Featherweight fighter Eddie Yagin to withdraw from his scheduled bout against Dennis Siver at UFC on FOX 5 next month.

Few details were known when the original report (read it here) of Yagin being hospitalized surfaced; however, now one day later, more information has surfaced.

Our friends at MMA Fighting received an update on the condition of the Hawaii native from his manager, Jason House of Iridium Sports Agency. House first explained how it all went down:

"He suffered it in sparring on Saturday. The injury was not the result of a certain strike or exchange. [He] came home, had a headache, started to vomit whatever liquids he drank and then decided to go to the ER the next day."

According to the report, the swelling to Yagin's brain led to his headaches. Fortunately, it appears for the timebeing that doctors do not think corrective surgery will be necessary for Yagin to completely recover from the scary setback.

Yagin trains at Aliance MMA in San Diego, Calif., alongside UFC veterans Brandon Vera, Dominick Cruz and Alexander Gustafsson, among others. He last fought at UFC 145 in April 2012, defeating Mark Hominick via split decision. "The Filipino Phenom" is even (1-1) under the UFC banner.

A replacement opponent for Siver at UFC on FOX 5 is unknown at this time, but with over three weeks until the Dec. 8, 2012, event the world's leading mixed martial arts (MMA) promotion has ample time to find a suitable replacement.

Stay tuned to MMAmania.com for future updates on Yagin's condition and his potential replacement.