Pop star Aaron Carter was given a health scare on Tuesday (02Apr13) when he suffered an allergic reaction.

The I Want Candy singer struggled to breathe during the drama, and was forced to take antihistamine medication Benadryl in a bid to ease his symptoms.

In a series of posts on his Twitter.com page, he writes, "Holy s**t!! I'm having the worst allergic reaction right now! Throat closing up and everything wtf (what the f**k).

"Ok Benadryl you helped but made me nauseous in return!!?? F**k!"

Carter later uploaded a photo of his puffy face and added, "Eyes still a little swolen (sic) from before."