What Bit Me?

Appearance: Flat, red, slightly raised welts 1–5mm. Often in a line or zigzag cluster (3–5 bites) called the "breakfast, lunch, dinner" pattern. May have a central red dot.

Where on body: Exposed skin — arms, shoulders, neck, face. Never under clothing waistbands.

Timing: Appear while asleep (1–5am). Not felt during the bite. Reaction appears 1–12 hours later. Some people have no visible reaction.

Itch level: Moderate to severe — individual variation is extreme. Some people have zero reaction; others have large hives.

Confirmation: Check mattress seams, box spring, and headboard for brown stains, shed skins, and live bugs the size of apple seeds.

Treatment: 1% hydrocortisone cream, oral diphenhydramine for severe itch. Treat the infestation — bites recur until eliminated.

Appearance: Small (1–3mm), intensely red, with a central puncture mark. Hard bump surrounded by reddened skin. May have a halo or not.

Where on body: Predominantly ankles, lower legs, and around the waistline — fleas jump from floor level. Children who crawl may have bites on face and arms.

Timing: Felt immediately as a sharp prick. Itch intensifies over hours. Reaction typically lasts 1–3 days.

Itch level: Very high — one of the most intensely itchy bites relative to size. Scratching can cause secondary infection.

Confirmation: "Flea dirt" test — brush pet fur onto white paper, add a drop of water. Red-brown smear confirms flea feces (digested blood).

Treatment: Do not scratch. Antihistamines, 1% hydrocortisone cream. Treat pet, home, and yard simultaneously.

Appearance: Soft, rounded, dome-shaped raised welt. Pale pink to red. 5–15mm. Slight central depression sometimes visible where proboscis entered.

Where on body: Any exposed skin — ankles, arms, neck, and face most common. Through thin clothing in some cases.

Timing: Felt as tickle or light prick during feeding. Bump appears within 5 minutes. Itches intensely for 4–48 hours then fades.

Itch level: High initially, fades over hours to days. Individual histamine response varies widely.

Disease risk: West Nile Virus (all U.S.), Zika (travel-related), Dengue (SE U.S./travel), EEE (Northeast/Midwest). Monitor for fever, rash, or headache within 2 weeks of bite.

Treatment: Ice, hydrocortisone cream, oral antihistamines. Seek care for systemic symptoms.

Appearance: Small red bump — usually just a mark from the bite after tick removal. The bullseye rash (erythema migrans) is a red expanding ring with possible clear center, appearing 3–30 days after bite — this is Lyme disease and requires immediate doxycycline.

Where on body: Anywhere — ticks favor warm hidden areas: behind knees, armpits, groin, scalp, ears, and back of neck.

Timing: Painless bite — tick may be found attached for hours. Disease transmission requires 36–48 hours attachment (Lyme) or as little as 4–6 hours (RMSF).

Disease risk: Lyme disease (bullseye rash), RMSF (fever + rash on wrists/ankles → palms/soles), Alpha-gal syndrome (Lone Star tick), ehrlichiosis, babesiosis.

Treatment: Remove tick promptly with fine-tipped tweezers — pull upward steadily. Do not twist. Clean with alcohol. Monitor 30 days for symptoms. Seek care immediately for rash or fever.

Appearance — early (0–8 hours): Often painless initially. Small redness or mild stinging. May resemble a pimple or mosquito bite.

Appearance — 12–36 hours: Characteristic "bullseye" develops — central blister surrounded by a pale ring (ischemic zone) surrounded by redness. The blister may turn dark.

Appearance — days 2–5: Tissue in the center may begin to die (necrosis) — turns dark, hard, and forms an ulcer. This is the defining brown recluse sign.

Where on body: Anywhere — most bites occur when spider is trapped against skin (putting on clothes, rolling onto a hidden spider in bed).

Treatment: Seek medical care immediately for any suspected brown recluse bite — early intervention limits tissue damage. Clean wound, elevate if on limb. Plastic surgery may eventually be needed for large necrotic wounds.

Appearance: Two small fang marks may be visible. Bite site mild — may resemble a pinprick with slight redness and swelling. The bite itself is NOT the problem.

Systemic symptoms (30–90 minutes): Severe muscle cramping that spreads from bite site — particularly in the back, abdomen, and chest. Abdominal rigidity is the hallmark symptom and is frequently misdiagnosed as appendicitis.

Full syndrome (2–8 hours): Sweating, nausea, elevated blood pressure, anxiety, fever. Symptoms peak at 8–12 hours and resolve over 1–3 days.

Who is at risk: Children, elderly, and people with cardiovascular conditions face the most serious risk. Healthy adults rarely experience life-threatening effects.

Treatment: Emergency room immediately. Antivenom available and effective. Pain management required — muscle cramping is severe. Do not apply ice or try home remedies.

Appearance: Immediate burning and sharp stinging at the moment of contact. Within 4–8 hours: red raised mark at each sting site. Within 24 hours: white sterile pustule forms at each sting site — this is the classic and definitive fire ant sign.

Where on body: Feet and ankles most commonly — fire ants defend their mounds in mass; a person standing on a mound receives dozens to hundreds of stings simultaneously.

Multiple stings: A single fire ant stings repeatedly in a circular pattern as it pivots on its biting mandibles — this creates the characteristic arc of stings from one ant.

Pustule management: Do NOT pop the pustules — secondary bacterial infection risk. Keep clean and dry. They resolve naturally in 8–10 days.

Anaphylaxis: Fire ant allergy is the #1 cause of insect-sting anaphylaxis deaths in the southeastern U.S. Any systemic reaction requires 911 and epinephrine.

Appearance: Small bleeding puncture wound that swells to a red, intensely itchy welt — often 5–10mm, disproportionately large for the 1–3mm insect. The reaction worsens over 24–48 hours.

Where on body: Exposed skin at the site of activity — particularly legs, arms, neck, and face. Near beaches, wetlands, and coastal areas.

Timing: 30 minutes before sunrise and after sunset are peak biting times. Also active on overcast days in still air.

Treatment: 1% hydrocortisone and oral antihistamines for the intense itch. The reaction can persist 1–2 weeks. Cold packs provide immediate relief.

Appearance: Small red bumps that intensify over 24–48 hours — often with a visible central feeding tube (stylostome). Intense halo of redness. Bites swell and itch intensely for 1–2 weeks.

Where on body: Concentrated at points of clothing constriction — waistband, sock line, collar, and anywhere skin folds. Chiggers migrate to these areas and feed there.

Key fact: Chiggers don't burrow into skin or stay attached — they feed on skin cells through the feeding tube, then fall off. By the time you itch, the chigger is gone.

Prevention: Showering immediately after being in chigger habitat removes most before they bite. DEET on clothing and exposed skin is effective prevention.

Treatment: Calamine lotion, oral antihistamines, 1% hydrocortisone. The feeding tube site itches for 1–2 weeks regardless of treatment.