What Does a Thermography Camera Actually Measure? Understanding Skin Temperature Patterns
by April Peters, LMT, CT, Certified Clinical Thermographer
September 4, 2026
You’ve probably seen a thermography image before—the beautiful mix of reds, oranges, yellows, blues, and greens that almost looks like a weather map of the body.
But what is the camera actually measuring?
A thermography camera measures infrared energy emitted from the surface of the skin and converts that information into a visual map of skin temperature patterns. It can document temperature distribution, symmetry, differences between areas, and patterns that may be compared over time.
And that is where thermography gets interesting.
It gives us a way to document something we normally cannot see just by looking in the mirror: how temperature is being distributed across the surface of the body.
Thermography Is Basically a Temperature Map of Your Skin
Here’s one of my favorite ways to explain thermography:
Think of a thermogram more like a weather map than an X-ray.
A weather map uses colors to show temperature differences across different locations. A thermogram does something similar with the surface of your body.
Your skin naturally emits infrared energy. A medical infrared camera can measure that energy without touching you and translate those measurements into an image.
The colors make those temperature differences easier to see.
Depending on the color palette being used, warmer areas may appear red, orange, yellow, or white, while cooler areas may appear blue, purple, or darker.
The important thing to understand is that the colors themselves are not diagnoses.
A red area doesn’t automatically mean inflammation. A blue area doesn’t automatically mean poor circulation. And a particular color does not mean cancer, injury, infection, or another medical condition.
The color is simply a visual representation of the temperature information recorded at the skin’s surface.
Why Skin Temperature Patterns Are Worth Documenting
This is the part of thermography that I find so fascinating.
The human body isn’t thermally uniform.
Different areas of the skin can naturally be warmer or cooler, and skin temperature can be influenced by many physiological and environmental factors. Activity, circulation near the skin, hormones, recent treatments, injury, exercise, room temperature, and even something as simple as a hot shower can affect what we see.
That is exactly why we pay attention to patterns rather than one isolated hot or cold spot.
During the review process, thermal images can be examined for things such as:
temperature distribution
differences from one side of the body to the other
warmer and cooler regions
patterns across a particular area
changes when images are repeated under comparable conditions
This creates a visual record of what your skin surface temperature patterns looked like at a particular point in time.
For many of my clients, that is one of the biggest reasons they choose thermography: they want another piece of information to add to the bigger picture of their health and wellness.
One Image Is Helpful. A Baseline Can Be Even More Useful.
One of the concepts I talk about often at Body in Focus is establishing a baseline.
Your first thermography appointment creates a starting point—a record of your skin surface temperature patterns on that day.
If thermography is repeated later under similar imaging conditions, the images can be compared.
Are the patterns relatively similar?
Has an area changed?
Is there a difference in symmetry or temperature distribution compared with the earlier images?
That ability to document and compare is an important part of thermography.
It does not mean that a change automatically represents a medical problem—or that an unchanged pattern guarantees everything is medically normal. Instead, it gives you another piece of information that can become part of your personal health record and, when appropriate, a conversation with your healthcare provider.
I love this aspect of thermography because it shifts the focus away from trying to make one image “mean” something and toward learning your own patterns over time.
Why Preparation Matters So Much
If thermography measures skin temperature, then anything that temporarily changes your skin temperature can potentially affect the image.
This is why your preparation instructions aren’t just a bunch of arbitrary rules I send you before your appointment!
Exercise can increase skin temperature. A hot shower can affect it. Massage, chiropractic treatment, cupping, lymphatic work, topical products, heating pads, saunas, and significant hot or cold exposure can also influence what the camera records.
Even the imaging room matters.
At Body in Focus, clients are given time to acclimate to the controlled imaging environment before images are captured. The goal is to reduce as many outside influences as reasonably possible so we’re documenting patterns under more consistent conditions.
This becomes especially important when we’re comparing today’s images with images taken months earlier.
Consistency makes comparison more meaningful.
The Camera Doesn’t See Inside Your Body
This is probably the biggest misconception I hear about thermography.
A thermography camera is not taking a photograph of what is underneath your skin.
It isn’t an X-ray, ultrasound, CT scan, or MRI.
If we capture an image over your abdomen, for example, we are recording the temperature pattern of the skin over the abdomen—not photographing the stomach, liver, intestines, or other organs underneath it.
The same principle applies everywhere else on the body.
Thermography provides physiological information about surface temperature, while other types of medical imaging may provide structural or anatomical information.
Those are very different types of information, and understanding that distinction actually makes thermography easier to understand.
It isn’t trying to be an X-ray or MRI.
It’s giving us a different type of picture: a map of temperature patterns at the body’s surface.
So Why Would Someone Choose Thermography?
People come to Body in Focus for many different reasons, but one theme I hear frequently is that they want to be more engaged in understanding and documenting their bodies.
Thermography offers a few characteristics that make it especially appealing for that purpose.
The image capture is:
Noncontact — the camera does not touch your body.
Radiation-free — infrared thermography does not use ionizing radiation to create the image.
Compression-free — there is no breast compression during thermographic imaging.
Repeatable — images can be taken again later to document and compare surface temperature patterns.
Visual — you can actually see the temperature distribution represented across the area being imaged.
I also think there’s something valuable about having a baseline before you ever feel like you “need” information.
We take baseline measurements in so many areas of life and health because having something to compare with later can provide context. Thermography can become one more piece of that personal record.
What Happens to the Images After Your Appointment?
Your appointment doesn’t end with me handing you a colorful picture and saying, “Here you go!”
At Body in Focus, we start with a detailed health intake because context matters when images are reviewed.
After your thermography session, your images and relevant history go through our established review process. Your report describes the thermal observations and provides interpretation and context for the patterns seen.
Then you have something tangible to keep as part of your health records.
If an observation, symptom, or concern warrants medical evaluation, thermography does not replace that evaluation. I encourage clients to take appropriate questions and concerns back to the healthcare professional who knows their medical history and can determine whether additional evaluation is needed.
That collaborative approach is exactly how I believe thermography should be used.
Understanding What Thermography Can—and Cannot—Tell You
Thermography can document and compare skin surface temperature patterns.
It can show us that one area appears warmer or cooler than another. It can show symmetry and asymmetry. It can establish a baseline. And repeat imaging can document whether surface patterns appear similar or different over time.
What it cannot tell us is why a particular temperature pattern exists.
Many different factors can influence skin temperature, which means a thermal observation should not be turned into a diagnosis.
Thermography does not diagnose cancer, inflammation, infection, thyroid disease, vascular disease, injury, or other medical conditions. It also does not replace mammography, ultrasound, MRI, laboratory testing, clinical examination, or medical care.
For breast health specifically, thermography is adjunctive. It can be used as an additional source of information, but it does not replace medically recommended breast screening or diagnostic imaging.
I don’t think we have to choose between being curious about our bodies and using established healthcare.
We can do both.
Why Choose Body in Focus Thermography?
My goal at Body in Focus is not simply to take thermal images.
I want you to understand what you’re looking at.
As a licensed massage therapist and certified clinical thermographer with nearly 20 years of experience working with the human body, I’ve spent much of my career helping people become more aware of their bodies and ask better questions about their health.
At your thermography appointment, I take time to review your health history, explain the imaging process, help you understand what the camera is measuring, and make the experience private and comfortable.
Body in Focus also offers mobile thermography locations throughout Middle Tennessee, making it easier for clients in Hendersonville, Nashville, Gallatin, Clarksville, Murfreesboro, Cookeville, and surrounding communities to add thermography to their personal wellness routine.
The goal is simple:
Document the patterns. Understand what the information means. Keep it in context. And use it as one more tool for becoming an informed participant in your own health.
Questions People Also Ask
What does a thermography camera actually measure?
A thermography camera measures infrared energy emitted from the skin and converts that information into a visual map of skin surface temperature patterns. It records temperature distribution rather than internal anatomy.
Does thermography see inside the body?
No. A thermography camera does not see through the skin or create an anatomical image of internal organs. It measures temperature at the body’s surface.
What do the colors on a thermogram mean?
The colors represent different measured temperature ranges. Depending on the color palette, warmer temperatures may appear as reds, oranges, yellows, or whites, while cooler temperatures may appear as blues or purples. A particular color does not represent a particular disease.
What causes hot and cold areas on a thermogram?
Skin temperature can be influenced by many factors, including blood flow near the skin, physical activity, hormones, environment, recent treatments, injury, sweating, medications, and normal individual variation. The image shows the temperature pattern but does not determine its cause.
Does thermography measure blood flow?
No. Thermography measures skin surface temperature, not blood flow itself. Blood flow near the skin is one of several factors that can influence surface temperature.
Can thermography diagnose inflammation?
No. An area of warmth may have many possible explanations. Thermography can document a warmer or cooler surface temperature pattern, but the image alone cannot determine whether inflammation is present or identify its cause.
Why is a baseline thermogram useful?
A baseline creates a record of your skin surface temperature patterns at one point in time. If you return for repeat imaging under comparable conditions, the images can be reviewed for stability or change.
Why do I have to prepare before a thermography appointment?
Because the camera measures skin temperature, activities that temporarily heat or cool the skin can affect the image. Following your preparation instructions helps reduce avoidable outside influences and supports more consistent imaging.
Can thermography be repeated?
Yes. Because thermographic image capture is noncontact and does not use ionizing radiation, images can be repeated. Repeat studies can document whether surface temperature patterns appear stable or changed over time.
Key Takeaways
A thermography camera measures infrared energy emitted from the skin and creates a visual map of skin surface temperature.
The colors on a thermogram represent temperature ranges—not diseases or diagnoses.
Thermography allows us to document temperature distribution, symmetry, asymmetry, and patterns across selected areas of the body.
A baseline provides a starting point that can be compared with later images taken under comparable conditions.
Thermography is noncontact and uses no ionizing radiation or breast compression during image capture.
Thermography provides a different type of information from anatomical imaging and should be used alongside—not instead of—appropriate medical care.
Ready to Learn More?
If you’ve been curious about thermography but weren’t quite sure what all those colors actually represented, I hope this helped make it a little clearer.
Thermography isn’t about turning every warm or cool area into a diagnosis. It’s about documenting patterns, creating a baseline, comparing information over time, and giving you another piece of information to bring into your overall health and wellness picture.
At Body in Focus Thermography, appointments are private, noncontact, and available at convenient locations throughout Middle Tennessee.
You can learn more about available thermography studies on the Body in Focus Thermography Services page or contact me to find an upcoming location near you.
Body in Focus Thermography
April Peters, LMT, CT
April@bodyinfocusthermography.com
615-207-2840
Serving Hendersonville, Nashville, Gallatin, Clarksville, Murfreesboro, Cookeville, and surrounding Middle Tennessee communities.
References
U.S. Food and Drug Administration
Med-Hot Thermal Imaging System
FLIR Systems
International Academy of Clinical Thermology
Thermography records skin surface temperature patterns. It is not a diagnosis and does not replace medically recommended screening or care. Breast thermography is adjunctive only and does not replace mammography or other breast imaging recommended by your healthcare professional.
