SHOCKING WARNING: NEVER IGNORE EARLY SIGNS LIKE THIS!

What started as a small sting turned into a horrifying medical emergency.

This terrifying image shows a hand severely swollen and blackened—an advanced infection that spread rapidly within hours. Doctors believe it may have been caused by a spider or insect bite, or possibly an aggressive form of necrotizing fasciitis, also known as flesh-eating bacteria.

If you ever notice swelling, intense pain, or discoloration like this after a bite or injury, seek emergency medical help IMMEDIATELY.