The former Fashion Police panelist shared the news on Instagram along with a photo of the vials of blood her doctor needed to take.
The 30-year-old designer didn't seem to be in terrible spirits after getting bitten. While waiting at the doctor's office, she snapped a selfie and joked about accidentally sitting beneath a medical poster diagraming human anatomy.
This isn't the first time Kelly has had a run-in with a venomous spider! Back in November she tweeted that a spider had bit her face, writing, "I have no words to express how much a spider bite to the face hurts!"
I have no words to express how much a spider bite to the face hurts! Plus a large injection in my jaw... today sucked balls!— Kelly Osbourne (@KellyOsbourne) November 16, 2014
Osbourne didn't give any details surrounding either spider attack, but it only goes to show that many people's wild and aggressive phobia of spiders is totally justified, because spiders are horrifying nightmare fuel.