Why are my bug bites still red after so many days?

Question

Hello doctor,

A few days back, I noticed a small swelling near my right wrist; it looked like an insect bite. Within a short time, it turned into a small red circular patch. The next day, I actually saw a green insect bite me on the same hand, and the same thing happened again: first swelling, then a red rash-like circle.

I also noticed an older red circular spot near my knee, which means something had bitten me earlier, too. That one even had a tiny pus-filled point in the center.

I took Levocetirizine and Montelukast once daily after dinner for three days. The knee area slowly improved, but the red swollen spots on my hand are still there. Usually, insect bites settle quickly for me, so it feels unusual that the redness has stayed for so many days.

While searching online, I came across articles about Lyme disease. I know it is not very common, but a few cases do occur, and the long-term complications mentioned online really scared me. I do not know what insect bit me, but the persistent redness is worrying.

I am attaching photos; one area is almost normal now, but the other one is still red (though it was much redder earlier).

Should I start an antibiotic?
If yes, which one, what dose, and for how many days?
Is this something that looks like a typical insect bite reaction, or should I be worried about anything else?

For background, I take Escitalopram oxalate 5 mg daily. I also have a mild sore throat right now, probably due to the weather change.

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I have read your query and can understand your concern.

From what you have described, and from the photos (attachment removed to protect the patient's identity), this really looks like a typical insect-bite reaction rather than anything dangerous. It is actually quite common for bites to stay red and swollen for several days, especially if you were bitten twice in the same area or if the skin got irritated from touching or scratching.

I understand why you were worried after reading about Lyme disease. It usually comes from a specific type of tick that stays attached to the skin for many hours. A quick bite from a small green insect does not match that pattern at all, so this does not point toward Lyme.

The fact that the spot near your knee has already started to settle is reassuring. The other one is still red, but since it is not spreading, getting hotter, or becoming more painful, it behaves much more like a local allergic or inflammatory reaction.

You can keep taking a daily antihistamine if the area feels itchy or irritated, and a soothing cream can help reduce the redness. The main thing is just to avoid scratching, so the skin can calm down naturally.

Do keep an eye on it, though. If the redness suddenly expands, becomes very painful, turns hot to the touch, starts producing more pus, or if you develop a fever or notice red streaking up the arm, that could mean a secondary infection, and in that case, you would need an in-person checkup and possibly antibiotics from a doctor.

Your mild sore throat sounds seasonal and unrelated to the bites.

For now, based on everything you have shared, there is no need to start antibiotics on your own. Most insect-bite reactions improve slowly, even if they take longer than expected. If anything changes or gets worse, you can update me anytime.

I hope this answers your query.

Please let me know if I can assist you further.

Thank you.

Why are my bug bites still red after so many days?

Persistent Bug Bites Companion