Bug Bite Infection: What You Need to Know

Got a bite from a mosquito, tick, or spider and it’s getting red, swollen, or painful? That could be an infection. Most bug bites heal on their own, but sometimes bacteria slip in and turn a simple itch into a real problem. Knowing the signs early can stop the spread and save you a trip to the ER.

How to Spot an Infection

First, look for the classic red ring that keeps growing around the bite. If the skin turns warm to the touch, feels hard, or you notice pus, those are warning lights. Fever, chills, or feeling generally sick mean the infection might be moving deeper into your body. It’s also a red flag if the bite doesn’t improve after a couple of days of normal care.

Sometimes the bite will start to throb more than it hurts to scratch. That throbbing feeling is a sign of inflammation, which often means bacteria are at work. Keep an eye on the size—if it’s spreading quickly, you probably need medical help.

Quick Ways to Treat It

Start with clean water and mild soap. Wash the area gently for at least 30 seconds, then pat it dry. After cleaning, apply an over‑the‑counter antibiotic ointment like bacitracin or polysporin. A thin layer is enough; the goal is to create a barrier that stops bacteria from growing.

If the bite is itchy, a cool compress can calm the skin without scratching. You can also use an anti‑itch cream that contains hydrocortisone, but avoid putting strong steroids on an infected wound unless a doctor says it’s okay.

Keep the bite covered with a breathable bandage. Change the dressing daily, or sooner if it gets wet or dirty. This keeps germs out and helps you see any changes in the wound. If you have a lot of swelling, pain, or fever, or if the redness spreads faster than a few centimeters per day, call your doctor. They might prescribe oral antibiotics such as amoxicillin or a different drug if you’re allergic.

Don’t forget about prevention. Use insect repellent on exposed skin, wear long sleeves in bug‑heavy areas, and check your body for ticks after being outdoors. Removing a tick promptly reduces the chance of infection dramatically.

In most cases, a bug bite infection can be handled at home with proper cleaning, an antibiotic ointment, and good wound care. But if you notice any of the warning signs—rapid swelling, pus, fever, or spreading redness—seek professional help right away. Acting fast keeps the infection from getting serious and gets you back to feeling normal sooner.