Diagnosis? Dick Van Dyke isn't feeling so hot these days.
The legendary actor was forced to scrap a planned public appearance due to unspecified medical condition that appears to be an neurological issue.
Van Dyke, 87, was expected to turn up to receive the Lifetime Achievement Award for Bettering Humanity Through Comedy at New York's 92Y, but a rep for the organization confirmed to E! News he wouldn't be able to make it.
"Due to a medical condition, Mr. Van Dyke is unable to travel to New York for the program," said the spokeswoman.
The Diagnosis Murder star however took to Twitter to let his fans know what's been ailing him.
"My head bangs every time I lay down. I've had every test come back that I'm perfectly healthy. Anybody got any ideas?" Van Dyke tweeted Wednesday.
After getting a slew of responses from his followers, the funnyman elaborated on the problem, saying it's been going on for seven years and revealing he's "had every test you can think of (CAT Scan, MRI, Spinal tap etc)."
Van Dyke then retweeted a question from another concerned follower asking if it feels "like your heartbeat/pulse throbbing in your head," to which he answered, "YES!!"
Van Dyke's publicist could not be reached for comment but did give a statement to Entertainment Tonight, saying that he had to bow out on the event due to "fatigue and lack of sleep resulting from symptoms of a yet-to-be diagnosed neurological disorder."
The rep added, on doctor's advice, the film and TV vet is currently resting at his home in Malibu, Calif.
Get well, Dick!