UD5 Toolkit
Pollen Calendar Reference – Online Month‑by‑Month Plant Guide
Select your region and see a static calendar of common pollen seasons. Informative for allergy sufferers.
Sting Reaction Tracker – Online Measure & Log Redness
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Avg Diameter
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Log Sting Reaction
Redness Visualization
10 mm — Level 2
Area: 78.5 mm²
0.79 cm²
Ref: ~0.5× penny
Reaction Log
0 recordsNo reactions logged yet.
Add your first sting reaction record to start tracking.
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Frequently Asked Questions
What is a sting reaction?
A sting reaction occurs when an insect (bee, wasp, hornet, mosquito, ant) injects venom or saliva into the skin, triggering localized redness (erythema), swelling (edema), itching, and pain. Most reactions are mild and resolve within hours to days.
How do I accurately measure redness diameter?
Use a ruler or measuring tape to measure the widest part of the red area in millimeters. Measure across the center of the reaction. For irregular shapes, measure the longest diameter. Common reference: a US penny is ~19mm, a quarter is ~24mm.
What's the difference between a normal and allergic reaction?
Normal reactions are localized (redness <50mm, mild swelling). Large local reactions (50–100mm+) may be more pronounced but aren't necessarily allergic. Systemic allergic reactions (anaphylaxis) involve symptoms far from the sting site—difficulty breathing, hives all over, dizziness—and require immediate emergency care.
When should I seek medical attention?
Seek emergency care if you experience: difficulty breathing, swelling of the face/throat/tongue, rapid heartbeat, dizziness, nausea, or widespread hives. Also consult a doctor if redness exceeds 100mm, shows signs of infection (pus, increasing pain, fever), or persists beyond 5–7 days.
How long do sting reactions typically last?
Mild mosquito sting reactions usually fade within 1–3 days. Bee and wasp stings may last 3–7 days, with swelling peaking around 24–48 hours. Allergy skin test reactions are typically measured at 15–20 minutes (immediate) and sometimes at 24–48 hours (delayed). Use this tracker to monitor changes over time.
What home remedies help reduce sting redness and swelling?
Apply a cold compress or ice pack (wrapped in cloth) for 10–15 minutes. Elevate the affected area. Over-the-counter antihistamines (diphenhydramine, cetirizine) and topical hydrocortisone cream can reduce itching and inflammation. Avoid scratching to prevent secondary infection.
Why track sting reactions?
Tracking sting reactions helps identify patterns, monitor healing progress, and provides valuable data for healthcare providers. If you're undergoing allergy testing or immunotherapy, detailed reaction logs help allergists adjust treatment plans. It also helps distinguish between normal variations and concerning trends.
Is my data stored securely?
Yes. All your sting reaction records are stored locally in your browser using localStorage. No data is ever uploaded to any server. You can clear all records at any time using the "Clear All" button. Note that clearing browser data will also remove stored records.