How Do You Treat Insect Bites That Leave Bruises?

By Staff WriterLast Updated Mar 27, 2020 1:14:53 AM ET

When bruising occurs four to eight hours after a bug bite, consider the possibility of a spider bite, such as that of a brown recluse, which is known to leave a distinct bruise, according to Everyday Health. Seek medical attention immediately if a brown recluse spider bite is a possibility for the bruising or if any symptoms of anaphylaxis, such as shortness of breath or swelling of the mouth, occur.