<s>[INST] I have a 10 yr old son who got bit by something 3 weeks ago, they were red swollen blue pussy and hard. Very painful for my son. I took him to the dr and they said it was a spider bite, mind you there was about 10 bites all around his behind. He got antibiotics and some went away but now he is getting more around the same place. And his old bites now look like little black/blue crators. Do you have any idea or opinions I should consider? Thanks [/INST] Hello, Welcome to Chat Doctor, Only a few spiders are dangerous to humans. Most presumed spider bites are actually bites from other bugs. For your symptoms, I would suggest you to clean the site of the spider bite well with soap and water. Apply a cool compress over the spider bite location. If the bite is on an extremity, elevate it. Aspirin or acetaminophen and antihistamines may be used to relieve minor signs and symptoms in adults. Talk to your doctor if you have concerns. Thank you. </s>