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What bit me?
Free AI bug bite identifier

Photograph the bite and get the most likely culprit, how the reaction usually develops, and the warning signs worth acting on. No sign-up, and your photo isn’t stored.

3 Clues that matter
Free No signup
0 Photos stored
AI Tool

Bug Bite Identifier

Photograph the bite in good light, without a filter

  1. 1Photo
  2. 2Details
  3. 3Scan
  4. 4Result
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Drag & Drop your bug photo

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JPG, PNG, WEBP · Max 10MB

Use clear, well-lit photos
Get as close as safely possible
Include wings, legs, and body markings
Bug preview
Photo ready

Location optional

Environment optional

Analyzing with AI…

Our AI is examining visual features, patterns, and markings of the bug.

Uploading image
Analyzing visual features
Matching species database
Compiling detailed report

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    What bit me?

    Three things separate one bite from another far better than appearance alone: the pattern they appear in, the place on your body, and how fast the reaction showed up. Give the tool a clear photo and those details, and it will name the most likely cause.

    What it will not do is diagnose you. It describes what a reaction most likely came from and what usually helps — and it tells you plainly when something needs a doctor rather than a website.

    How to tell common bites apart

    Most bites people worry about come from four sources. They are hard to tell apart from a single mark, and much easier from the pattern.

    Likely causePatternUsual locationTiming
    Bed bugLine or zigzag of 3–5Arms, shoulders, neck — skin exposed while asleepOften hours to days later
    MosquitoScattered single bumpsAny uncovered skinWithin minutes
    FleaClusters of small red dots, often with a darker centreAnkles and lower legsWithin minutes to an hour
    ChiggerTight cluster, intensely itchyWhere clothing is tight — waistband, sock line3–6 hours later

    Two more worth recognising on sight. A tick may still be attached, and an expanding circular rash around the site in the days afterwards is a reason to call a doctor rather than wait. A sting from a bee, wasp or hornet hurts immediately and sharply, which is usually enough to tell it from a bite you only noticed later.

    When to see a doctor

    Most bites need nothing but time and something for the itch. A few need medical attention, and the signs are specific enough to be worth knowing by heart.

    Call emergency services now

    Difficulty breathing, swelling of the face, lips, tongue or throat, a rapid heartbeat, dizziness or fainting, or a rash spreading fast across the body. These are signs of a severe allergic reaction and it does not matter what caused the bite.

    See a doctor soon

    Redness spreading outward from the site, a red streak running toward the body, pus or oozing, increasing pain after the first day, fever, or swollen glands. These suggest infection rather than an ordinary reaction.

    Get it looked at

    An expanding circular or bullseye rash after a tick bite. A blistering wound with a darkening centre. Any bite that is still getting worse after several days instead of settling.

    What usually helps

    For an ordinary bite: wash it with soap and water, use a cold compress for the swelling, and leave it alone. Antihistamines and hydrocortisone cream both help with itching, which is worth doing — scratching is how a harmless bite becomes an infected one.

    If a tick is still attached, take it off with fine-tipped tweezers, gripping as close to the skin as possible and pulling straight out with steady pressure. Do not twist it, and do not try to burn it or smother it in petroleum jelly.

    Getting a photo the tool can read

    What to doWhy it helps
    Natural light, no flash and no filterFlash washes out the redness that carries most of the information
    Include the surrounding skin, not just the markThe pattern around a bite is often more diagnostic than the bite
    Photograph the whole cluster if there is oneA line of three says bed bug in a way one bump never will
    Add where it is on your bodyAnkles, waistband and exposed sleeping skin each point somewhere different
    Re-photograph after a day if it changesHow a reaction develops separates an ordinary bite from an infected one
    Answers

    Frequently asked questions

    What bit me?

    Photograph the bite and the tool names the most likely cause from the pattern, the location on your body and how the reaction developed. Bed bug, mosquito, flea and chigger bites account for most cases. It describes the likely cause — it does not diagnose, and it will tell you when to see a doctor.

    How do I tell a bed bug bite from a mosquito bite?

    Pattern and timing. Bed bug bites usually appear in a line or zigzag of three to five on skin that was exposed while you slept, and often show up hours or days later. Mosquito bites are scattered single bumps on any uncovered skin and swell within minutes.

    Why are my bites only on my ankles?

    That is the classic flea pattern — small red dots in clusters on the lower legs, often with a darker centre. Fleas jump from floor level, so they reach ankles first. Chiggers cluster where clothing is tight instead, like a waistband or sock line.

    How long do bug bites last?

    An ordinary mosquito or flea bite settles within a few days. Bed bug and chigger bites often itch for a week or more. What matters more than the duration is the direction: a bite that is still getting worse after several days should be seen by a doctor.

    When should I worry about a bug bite?

    Get emergency help for difficulty breathing, swelling of the face or throat, a rapid heartbeat, dizziness, or a fast-spreading rash. See a doctor for redness spreading outward, a red streak toward the body, pus, fever, or an expanding bullseye rash after a tick bite.

    What does an infected bite look like?

    Redness that keeps spreading outward from the site rather than fading, warmth, increasing pain after the first day, pus or oozing, and sometimes fever or swollen glands. A red line running from the bite toward the trunk needs medical attention promptly.

    How do I remove a tick safely?

    Use fine-tipped tweezers, grip the tick as close to the skin as you can, and pull straight out with steady pressure. Do not twist, and do not use heat or petroleum jelly. Clean the area afterwards, and watch for an expanding circular rash over the following days.

    Can this tool diagnose my bite?

    No, and it does not try to. It is an AI reading a photo, not a clinician examining you. It describes the most likely cause and general self-care, and it flags the signs that mean you should stop reading and see a doctor.

    Is the bug bite identifier free?

    Yes. No account, no download, no charge. Your photo is used to produce the result and is not stored afterwards.

    This page is for general information and identification help. It is not medical advice and not a diagnosis. For a severe reaction — difficulty breathing, swelling of the face or throat, dizziness — contact a doctor or your local emergency number immediately.