Decoding Oral Temperature: Do You Add a Degree When Taking Temp Under Tongue?
No, you do not need to add a degree when taking a temperature orally (under the tongue) with a properly calibrated thermometer. Oral temperature readings are generally accurate and reliable indicators of core body temperature when taken correctly.
Understanding Oral Temperature Measurement
Taking your temperature is a fundamental way to monitor your health. While various methods exist, oral temperature measurement, using a thermometer placed under the tongue, is a common and convenient choice for many. This method is non-invasive and generally well-tolerated. Understanding the principles behind this technique is crucial for accurate readings and informed healthcare decisions.
The Science Behind Oral Temperature
The mouth, particularly the area under the tongue, contains a network of blood vessels close to the surface. This proximity allows a thermometer placed there to accurately reflect the body’s core temperature. The core temperature represents the temperature of the vital organs, providing a baseline for assessing overall health.
How to Take an Accurate Oral Temperature
Ensuring the accuracy of your oral temperature reading is paramount. Following these steps can minimize errors and provide a reliable measure of your body temperature:
- Choose the Right Thermometer: Digital thermometers are generally preferred for oral readings due to their accuracy and speed. Ensure the thermometer is clean and disinfected before use.
- Wait Before Taking Temperature: Avoid eating, drinking, or smoking for at least 15 minutes before taking your temperature. These activities can temporarily affect the oral temperature, leading to inaccurate readings.
- Positioning is Key: Place the thermometer tip under your tongue, towards the back of the mouth. Close your mouth gently, ensuring your lips are sealed around the thermometer.
- Maintain Contact: Keep the thermometer in place until it beeps or indicates that the reading is complete. This usually takes between 30 seconds to a minute, depending on the thermometer model.
- Record the Reading: Note the temperature reading accurately. If you’re tracking your temperature over time, consider keeping a log for future reference.
Normal Temperature Ranges and When to Worry
A normal oral temperature typically falls between 97.6°F (36.4°C) and 99.6°F (37.6°C). However, individual variations exist, and what’s considered normal for one person may differ slightly for another. A temperature above 100.4°F (38°C) is generally considered a fever. Contact a healthcare professional if you experience a high fever, especially if accompanied by other concerning symptoms.
Common Mistakes to Avoid
Several common mistakes can lead to inaccurate oral temperature readings. Avoiding these errors can improve the reliability of your measurements:
- Eating or Drinking Beforehand: As mentioned earlier, food and beverages can influence the oral temperature.
- Improper Thermometer Placement: Ensure the thermometer tip is properly positioned under the tongue and that your mouth is closed.
- Using a Dirty Thermometer: Always clean and disinfect the thermometer before each use to prevent the spread of germs.
- Not Waiting Long Enough: Do not remove the thermometer before it has completed its reading cycle.
- Not Calibrating Thermometer: Check your thermometer’s accuracy periodically. Follow the manufacturer’s instructions for calibration.
Factors Affecting Oral Temperature Readings
Several factors can influence oral temperature readings, including:
- Time of Day: Body temperature naturally fluctuates throughout the day, typically being lower in the morning and higher in the evening.
- Age: Children tend to have slightly higher temperatures than adults.
- Activity Level: Physical activity can temporarily increase body temperature.
- Medications: Certain medications can affect body temperature.
- Environmental Temperature: Extreme environmental temperatures can also impact oral temperature.
Thermometer Types for Oral Use
While digital thermometers are most common, other types, like mercury thermometers, were used historically. However, due to safety concerns, mercury thermometers are largely being phased out.
Here’s a comparison:
| Thermometer Type | Accuracy | Speed | Safety | Cost |
|---|---|---|---|---|
| —————- | ———- | ——– | ——– | ——– |
| Digital | High | Fast | Safe | Moderate |
| Mercury | High | Moderate | Low | Low |
| Infrared | Moderate | Very Fast | Safe | High |
Alternatives to Oral Temperature Measurement
If oral temperature measurement is not possible or advisable (e.g., in young children or individuals with certain medical conditions), alternative methods include:
- Axillary (Armpit): Temperature taken under the armpit. Usually requires adding a degree to the reading for an equivalent oral temperature.
- Tympanic (Ear): Temperature taken in the ear canal.
- Rectal: Temperature taken in the rectum. Considered the most accurate, but also the most invasive.
- Temporal Artery (Forehead): Temperature taken on the forehead using a temporal artery scanner.
Frequently Asked Questions (FAQs)
What is considered a normal oral temperature?
A normal oral temperature typically falls between 97.6°F (36.4°C) and 99.6°F (37.6°C). Keep in mind that individual variations exist, so understanding your own baseline temperature is important.
Do you add a degree when taking temp under tongue? If my oral temperature is 99.0°F, is that considered a fever?
Generally, you do not add a degree to an oral temperature reading. A temperature of 99.0°F is within the normal range for most people. A fever is typically defined as a temperature above 100.4°F (38°C).
Can I take my temperature right after brushing my teeth?
It’s best to wait at least 15 minutes after brushing your teeth before taking your oral temperature. The temperature of the water and toothpaste can temporarily affect the reading.
How do I clean my digital thermometer properly?
Clean the thermometer with soap and water or use rubbing alcohol. Ensure the thermometer is completely dry before storing it. Always follow the manufacturer’s instructions for cleaning.
Is an oral temperature more accurate than a forehead scan?
Oral temperature is generally considered more accurate than a forehead scan, especially in environments with temperature fluctuations. Forehead scans are convenient but can be influenced by external factors.
My child refuses to hold the thermometer under their tongue. What should I do?
If your child refuses to hold the thermometer under their tongue, consider using an axillary (armpit) thermometer or a temporal artery (forehead) thermometer. Remember that axillary readings require adding a degree to approximate an oral temperature.
Can certain medications affect my oral temperature?
Yes, certain medications, such as those that lower fever (antipyretics) or some decongestants, can affect your oral temperature. Consult with your doctor or pharmacist if you have concerns about how your medications might affect your temperature.
Why is my temperature higher in the evening than in the morning?
Body temperature naturally fluctuates throughout the day, with the lowest point typically in the early morning and the highest point in the late afternoon or early evening. This is due to the body’s natural circadian rhythm.
What do I do if I consistently get different readings with my thermometer?
If you consistently get different readings with your thermometer, consider replacing it or checking its calibration. Battery issues could also impact accuracy.
If I have just eaten or drank something hot or cold, how long should I wait before taking my oral temperature?
You should wait at least 15 minutes after eating or drinking something hot or cold before taking your oral temperature. This allows your mouth temperature to return to its baseline.
Does the brand of thermometer matter for accuracy?
While generally, digital thermometers are accurate, investing in a reputable brand known for accuracy and reliability is recommended. Read reviews and consider thermometers that have been clinically tested.
When should I see a doctor about a fever after taking my temperature orally?
You should see a doctor if you have a fever above 100.4°F (38°C), especially if accompanied by other concerning symptoms such as severe headache, stiff neck, shortness of breath, chest pain, or confusion. A persistent fever warrants medical evaluation.