> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sonohealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Take an Accurate Temperature at Home

> Forehead, ear, oral, and rectal methods compared, plus step-by-step tips for accurate readings and why measurement site changes what's normal.

A temperature reading guides real decisions — whether to call the doctor, give medicine, or keep a child home. Getting an accurate number depends on choosing the right method and using good technique.

<Note>
  Normal ranges differ slightly by measurement site, so note which method you used when sharing a reading with a clinician. In infants under 3 months, any fever of 100.4°F (38°C) needs urgent care.
</Note>

## Which method is most accurate?

Each method is reliable when done correctly, but they aren't interchangeable:

* **Rectal** — considered the gold standard for **infants and young babies** when precision matters most.
* **Oral** — accurate for cooperative older children and adults; avoid hot or cold drinks just before.
* **Ear (tympanic)** — fast and convenient; correct positioning matters and earwax can interfere.
* **Forehead (temporal/infrared)** — quick, hygienic, and great for sleeping children, when used per the instructions.

## How to take an accurate forehead reading

Forehead (infrared) thermometers are popular for their speed and no-contact convenience. For the best result:

* Make sure the forehead is **dry and uncovered** — free of sweat, hair, makeup, or sunscreen.
* Wait if the person just came in from **heat or cold**, or was exercising.
* Hold or scan at the **distance the manual specifies**, and avoid drafts or direct sun.
* Take **two or three readings** and look for consistency.

## Why readings sometimes differ

If your forehead thermometer gives different numbers, common culprits are sweat, makeup, room temperature, drafts, recent activity, or holding the device at the wrong distance. Wipe the skin, let the person settle, follow the device's instructions, and compare a couple of readings rather than trusting one.

## Match the number to the method

Because normal ranges vary slightly by site, a reading is most useful alongside the method used. What matters most is the trend and how the person feels — see our [fever guide](/thermometer/fever-guide) for when a temperature needs medical attention.

SonoHealth's **ThermoPRO** and **ThermoMax** thermometers are designed for fast, simple home readings — see them at [SonoHealth.com](https://sonohealth.com/shop/).

***

**Related:** [Fever Guide](/thermometer/fever-guide)