Allergy vs Cold Simulator

Differential symptom model — allergic rhinitis versus viral common cold.

Current Stage

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Allergy likelihood

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Cold likelihood

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Pattern class

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Confidence

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Itch / sneeze intensity (0-10)5

Fever present (0=No, 1=Yes)No

Allergic rhinitis panel

Common cold panel

Clear watery discharge

Thick colored discharge

Fever heat signature

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Onset Speed and Duration Differ Sharply

Allergy symptoms appear almost instantly on exposure.

<30 min: Allergy onset (placeholder timing figure)
1-3 days: Cold onset (placeholder incubation note)
Weeks: Allergy duration (while exposed to trigger)
7-10 days: Cold duration (typical self-limited course)

Timing curve placeholder

Short placeholder note on onset and duration curves.

Itchy Eyes and Nose Signal Allergy

Itching rarely occurs with a plain viral cold.

~80%: Itch in allergy (placeholder prevalence figure)
~10%: Itch in cold (placeholder prevalence figure)
Common: Eye involvement (allergic conjunctivitis overlap)
Frequent: Sneeze bursts (characteristic allergy pattern)

Itch signal placeholder

Short placeholder note on itch as a differentiator.

Discharge Color and Consistency Compared

Clear thin discharge favors allergy over infection.

Clear/thin: Allergy discharge (placeholder consistency note)
Thick/colored: Cold discharge (placeholder consistency note)
Day 3-5: Color shift day (placeholder viral progression)
Unchanging: Allergy color (stays clear throughout)

Discharge placeholder

Short placeholder note on discharge appearance differences.

Fever Presence Strongly Favors Viral Cold

Fever is uncommon in allergic rhinitis cases.

Rare: Fever in allergy (placeholder near-absent figure)
Sometimes: Fever in cold (placeholder mild fever figure)
Cold only: Body aches (placeholder systemic symptom)
Cold-leaning: Sore throat (placeholder overlap symptom)

Fever placeholder

Short placeholder note on fever as key differentiator.

Seasonal Pattern vs Contagious Spread

Allergy tracks pollen seasons; colds spread between people.

Pollen/dust: Allergy trigger (placeholder seasonal driver)
Rhinovirus: Cold trigger (placeholder viral driver)
Cold: Yes: Contagious? (placeholder transmission note)
Allergy: Yes: Recurs yearly? (placeholder seasonal recurrence)

Pattern placeholder

Short placeholder note on seasonal versus contagious pattern.

Placeholder takeaway: combine timing, itch, discharge, and fever to classify.