How to Fake a Fever (Safely & Convincingly)

Faking a fever can get you out of an exam or meeting in a pinch, but pulling it off requires some clever tricks and a bit of acting. Here’s how to convincingly fake a fever, boost your temperature reading, and display believable symptoms—without going overboard.

Boosting Your Thermometer Reading

Run a thermometer under warm water until it reads just above 100.5°F

(38.1°C), but never exceed 102°F (39°C) to avoid suspicion or unnecessary concern.
For mercury thermometers, gently shake while holding the metal tip to raise the reading, but avoid shaking too hard or breaking the glass.

With digital thermometers, rub the metal tip between your fingers to warm it up.
Eat or drink something warm (like tea or soup) just before your temperature is taken by mouth. Hold the warm liquid in your mouth briefly for a subtle boost.

Looking Feverish and Warm

Heat your forehead with a hot water bottle or a heating pad (on low, with a towel barrier) for a few minutes to make it feel warm to the touch.

Eat spicy foods like chili or curry to naturally raise your body temperature and create a flushed look.

Exercise briefly or hide under a blanket to make your face appear red and warm.

Use a warm, damp washcloth or lightly spritz your face with water to mimic sweaty, clammy skin.

Acting Out Fever Symptoms

Say you feel cold, not hot, and bundle up under blankets. Add subtle shivers or a trembling jaw for realism.

Act tired and sluggish—slouch, lean on your arm, and keep your eyes half-closed.

Lose your appetite: ask only for water, tea, or something bland like toast.

Add a few sniffles, sneezes, or coughs to mimic cold symptoms, and scatter tissues around for effect.

If you’re not confident faking a cold, complain of a headache or stomachache instead.
Keep it subtle—don’t overact or pile on too many symptoms, or you risk being caught or sent to the doctor unnecessarily.