Senator Derryn Hinch has suffered a brain trauma after falling and hitting his head as he was getting out of an Uber on Monday evening. Credit:Joe Armao

Senator Derryn Hinch has suffered a brain trauma after falling and hitting his head as he was getting out of an Uber on Monday evening.

It is believed the shock-jock turned senator had consumed two glasses of wine during a night out before he slipped and was knocked unconscious on St Kilda Road.

"I stepped on the kerb and I fell over and I banged my head and I ended up in The Alfred hospital," Senator Hinch told Sky News.

A spokeswoman for the senator confirmed he had suffered a minor brain injury and spent a night in The Alfred hospital for observation.