Signs of Thyroid Problems
What Your Body Might Be Trying to Tell You
I have spent more than twenty years in healthcare and wellness. I have a biology degree. I was on the founding team of a nuclear pharmacy, the corner of medicine that prepares radioactive compounds for imaging and treatment, including the radioactive iodine used to scan and treat the thyroid. I spent years as West Coast director of sales for a medical equipment company, and today I run Kate Curtis Wellness as a certified functional wellness practitioner.
So when I tell you the thyroid deserves more of your attention, I say it with a slight glow.
Here is the thing about thyroid disease. It rarely makes a grand entrance. It shows up as an afternoon crash, weight gain you cannot explain, hair loss in the shower drain, dry skin that laughs at your moisturizer, or feeling cold when everyone else is fine. On the other end, it can look like anxiety, a racing heart, or losing weight without trying (NIDDK; NIDDK).
Your thyroid gland is a small, butterfly-shaped gland at the front of your neck. It makes thyroid hormones that regulate how your body uses energy, which touches nearly every system you have (NIDDK).
The catch: many signs of thyroid trouble overlap with other conditions, which makes them easy to miss or misread (Mayo Clinic). So treat this list as a REASON to get evaluated, NOT a way to diagnose yourself at 11 p.m. with forty browser tabs open.
What Are The Signs of Thyroid Problems?
A thyroid problem usually falls into one of two camps. HyPOthyroidism = the thyroid makes too LITTLE hormone, and the body slows down. HypERthyroidism means it makes TOO MUCH, and the body speeds up (InformedHealth.org, NIH).
The types of thyroid conditions behind those camps vary, and so do the symptoms. In the United States, Hashimoto's disease, an autoimmune condition where the immune system attacks the thyroid, is the most common cause of an underactive thyroid (NIDDK). I actually think that most if not all autoimmune conditions are a result of toxicity in the body & and underlying cause. Like -why would your body attack itself? I’ve seen great results.
Graves' disease is the most common cause of an overactive one (NIDDK). Thyroid nodules, lumps within the gland, are common and usually benign, though some produce excess hormone and a small percentage are thyroid cancers (American Thyroid Association). And postpartum thyroiditis can swing a new mother from overactive to underactive in the year after delivery (American Thyroid Association).
Physician Dr. Julia T. Hunter, someone I have collaborated with, puts it plainly: "The symptoms are all over the place for different people." Which is exactly why the lists below are a starting point, not a scorecard.
What Are The Signs Of An Overactive Thyroid Gland?
When the thyroid overproduces, the body runs like it had four espressos and skipped lunch.
Unexplained Weight Loss: Eating More, Weighing Less
Losing weight without trying is one of the classic symptoms of thyroid overactivity (Mayo Clinic). It sounds like a dream until you realize your body is burning through its reserves.
Racing or Irregular Heartbeat: Your Pulse Picks Up at Rest
A fast or irregular heartbeat is a common sign (Mayo Clinic). Left untreated, an overactive thyroid raises the risk of cardiovascular disease (InformedHealth.org, NIH), so this one deserves prompt attention.
Nervousness and Irritability: Wired for No Reason
Nervousness, anxiety, and irritability are frequent companions of excess thyroid hormone (InformedHealth.org, NIH). If you feel on edge and cannot name why, your hormones may be part of the answer.
Heat Intolerance and Sweating: Always the Warmest Person in the Room
Feeling hot when everyone else is comfortable, and sweating more than usual, points to a metabolism in overdrive (InformedHealth.org, NIH).
Shaky Hands: A Fine Tremor
A slight trembling in the hands and fingers is a recognized sign of hyperthyroidism (Mayo Clinic).
Swelling at the Front of Your Neck: A Goiter or a Lump
An overactive thyroid often enlarges the gland, a condition called a goiter. You may see or feel fullness at the front of your neck, or a single lump instead (InformedHealth.org, NIH).
Treatment for hyperthyroidism can include medication, radioactive iodine, or surgery (Mayo Clinic). Each has side effects worth a real conversation with your doctor.
What Are The Signs And Symptoms Of Underactive Thyroid?
Common symptoms of hypothyroidism include fatigue, weight gain, feeling cold, dry skin, thinning hair, and constipation, and they tend to creep in slowly (NIDDK). That slow creep is why so many people shrug them off for years.
Afternoon Fatigue: The 3 p.m. Wall
Dr. Hunter describes the pattern she watches for: people who are "tired in the afternoon" and would "kill for a nap after 3 p.m." Fatigue is one of the most common symptoms of an underactive thyroid (NIDDK). Everyone hits a slump. The difference is a crash that shows up daily, no matter how well you slept.
Always Cold: Hands, Feet, and Even Your Nose
Feeling cold when others are comfortable is a hallmark of low thyroid function (NIDDK). Dr. Hunter checks for cold feet first, then cold hands, and sometimes a cold nose. If you wear socks to bed in Phoenix in July, pay attention.
Weight Gain That Does Not Match Your Habits
Unexplained weight gain is common with hypothyroidism because a slower metabolism burns less energy (NIDDK). Same plate, same workouts, different scale.
Dry Skin and Hair Loss: The Beauty Counter Cannot Fix This One
Dry skin and hair loss can both signal low thyroid hormones (NIDDK). Plenty of things cause dry skin. But when it arrives with fatigue and cold sensitivity, it earns a mention to your doctor.
A Scalloped Tongue: Ruffled Edges "Like a Plate"
This is Dr. Hunter's favorite mirror check: "See if the tongue is ruffled on the edges like a plate." Hypothyroidism can make the tongue swell, a condition called macroglossia, which can leave scalloped tooth marks along the sides (Clinical Case Reports). Scalloping has other causes too (Healthline), so treat it as a CLUE, not a verdict.
Brain Fog and Low Mood
Memory problems, trouble concentrating, and depression can accompany an underactive thyroid (NIDDK). If your brain feels like it is running on dial-up, it is worth asking why.
Stress, Cortisol, and Your Thyroid:
The Piece Most People Skip
I think stress and the adrenals are among the most overlooked pieces of the thyroid puzzle, and the science supports the connection. Stress hormones called glucocorticoids, cortisol among them, can suppress TSH, the signal that tells your thyroid to get to work (review, PubMed Central). Stress also appears to play a role in autoimmune thyroid disease. A meta-analysis of thirteen studies found that stressful life events are one of the environmental triggers for the onset of Graves' disease (BMC Endocrine Disorders).
So I focus on supporting a healthy cortisol rhythm: wake up and get early sun in your eyes, similarly- go for a sunset walk in the evening, hydration. These are my non-negotiables.
Morning Light, Dim Nights
Light in the early morning boosts the natural cortisol rise after waking (Journal of Clinical Endocrinology and Metabolism). At night, bright light, especially the blue-heavy kind from screens and overhead bulbs, can push cortisol up when it should be winding down (systematic review). Sunrise on the patio. Lamps, not overheads, after dark. AND NO LED lights!
Protect Your Sleep
Short sleep raises evening cortisol, right when it should be falling (Sleep). A consistent bedtime is not glamorous. It works.
No Caffeine After 12 Noon
Caffeine raises cortisol, and even in daily coffee drinkers, a 1 p.m. dose kept cortisol elevated into the evening (Psychosomatic Medicine). It also steals sleep. Caffeine taken 6 hours before bed cuts total sleep by more than an hour (Journal of Clinical Sleep Medicine). Hence the 12 noon cutoff.
Drink Your Water
Adults who drank less than 1.5 liters of fluid a day had a cortisol response to stress more than 50 percent higher than those who met intake recommendations (Liverpool John Moores University). In Phoenix, that is not optional- and don’t forget to add Celtic salt/electrolytes to make sure it GETS INTO your cells.
These habits support your stress response. They do not replace thyroid testing or treatment, so pair them with the next step.
See these hydration tips to help.
When Should You Talk to a Doctor About Thyroid Symptoms
Talk to your healthcare professional when symptoms persist for several weeks, stack on top of each other, or start interfering with your work, sleep, or relationships. Some situations call for sooner rather than later.
A lump, swelling, or tightness at the front of your neck, trouble swallowing, or a hoarse voice that lingers should be checked (American Thyroid Association). A racing or irregular heartbeat deserves prompt attention. A family history of thyroid disease, a recent pregnancy, or symptoms returning while you are already on thyroid medication are all good reasons to book the appointment.
Diagnosis starts with blood tests. TSH, or thyroid stimulating hormone, is usually first. It is made by the pituitary gland and tells your thyroid how much hormone to produce. Free T4, sometimes T3, and thyroid antibodies, which help identify Hashimoto's disease, round out the picture (American Thyroid Association).
Dr. Hunter believes TSH alone often misses the full story, and she pushes for a broader panel: free T3, free T4, reverse T3, iodine, and cortisol alongside TSH. Reverse T3 and iodine testing are less standard, so ask your practitioner whether they make sense for you.
Her insistence on checking the adrenals first has real science behind it. In people with adrenal insufficiency, starting thyroid hormone before treating the adrenals can trigger a life-threatening adrenal crisis (Endocrine Abstracts). Ask your doctor whether your adrenal function should be evaluated before any thyroid treatment begins.
Whatever direction you go, prescription or supplement, start it with your practitioner's guidance and your labs in hand. Your body has been talking. The right professional can help you finally translate what it is saying.
