Frankie Muniz Recovering from a 'Mini-Stroke'

Malcolm's in the middle of a health scare.

Former child star Frankie Muniz is recovering from "mini-stroke" that sent him to the hospital last Friday.

Muniz, who turns 27 on Wednesday, tells his Twitter followers that the experience was "not fun at all."

"Have to start taking care of my body!" he writes. "Getting old!"

Muniz provided no more details. But a "mini-stroke" is commonly used to describe a transient ischemic attack, or TIA, when blood temporarily stops reaching the brain, causing stroke-like symptoms for one to 24 hours.

Doctors believe a TIA can be a warning sign for a possible full stroke in the future without preventative measures.

Muniz grew up in front of TV audiences on Malcolm in the Middle from 2000 to 2006. He's moved on to racecar driving and music – he drums for the band Kingsfoil – though recently made a cameo on Don't Trust the B---- in Apartment 23.