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Mayo Clinic
mayoclinic.org › diseases-conditions › hyperthyroidism › symptoms-causes › syc-20373659
Hyperthyroidism - Symptoms and causes - Mayo Clinic
November 30, 2022 - Understand what happens when your thyroid is overactive and learn about treatment for this condition.
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NHS
nhs.uk › conditions › overactive-thyroid-hyperthyroidism › symptoms
Overactive thyroid (hyperthyroidism) - Symptoms - NHS
Read about the symptoms of an overactive thyroid (hyperthyroidism), which include anxiety, hyperactivity and feeling tired all the time.
Discussions

My doc added T3 after ten years of consistently worsening hypo symptoms taking only synthroid for hypothyroid and hashimotos
Because doctors are fkn stupid. It's amazing how often I get downvotes for saying it, but it's true. People can't bring them selves to accept that their norm, where doctors fix them and do no harm, is not true. It's sad that people can't think for themselves... More on reddit.com
🌐 r/Hashimotos
124
99
June 25, 2022
T4/t3 combination - what symptoms did it resolve for you, if you use it?
I still feel basically dead with t4-only. If I increase the dose, I just get side effects but no benefits. Using a t4/t3 combo (NP thyroid) lets me feel like a functional human again. For me, that means: energy and motivation to do things, a MUCH improved mood, warmer hands and feet, normal blood pressure (as opposed to low) and a robust appetite. Many people seem to do fine with t4 only and their body converts it just fine but I am not one of those people and I am thankful we have other options! Sorry I just saw that you asked about levo/lio specifically, which I have not done but I think if you are handling the levo alright and add t3, you could expect similar benefits to those of us on armour/NP thyroid etc. More on reddit.com
🌐 r/Hypothyroidism
47
9
September 13, 2024
Patients Requesting T3
“I don’t typically order that as it won’t change what we do for you, but we can check it once. You may get a bill for it since it’s not a necessary test, are you ok to pay out of pocket for it?” I don’t think the fight is worth it for a full “no”but this sets up the expectation for follow up when we talk about results. More on reddit.com
🌐 r/FamilyMedicine
118
129
May 17, 2025
Low T3 Syndrome?
I have a TSH of 1.2 and a free t3 of 3.1 which is just in the range barely by 0.1. My free t4 is very high (normal range though). Does this indicate a conversion issue? I am not on any thyroid meds however I have symptoms super similar to hypothyroidism. I have a very puffy face despite being ... More on reddit.com
🌐 r/Hypothyroidism
10
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July 11, 2024
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MedlinePlus
medlineplus.gov › home › health topics
Hyperthyroidism | Graves' Disease | Overactive Thyroid | MedlinePlus
Adults over age 60 may have different symptoms than younger adults. For example, they may lose their appetite or withdraw from other people.
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University of Michigan Health
uofmhealth.org › home › our care › specialties & services › hyperthyroidism & graves’ disease
Hyperthyroidism & Graves’ Disease | University of Michigan Health
This disorder occurs in about 1% of all Americans and affects women much more often than men. In its mildest form, hyperthyroidism may not cause noticeable symptoms; however, in some patients, excess thyroid hormone and the resulting effects on the body can have significant consequences.
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American Thyroid Association
thyroid.org › home › hyperthyroidism
Hyperthyroidism | American Thyroid Association
July 28, 2023 - Lab test results in hyperthyroidism usually show high T4 and/or T3 and low TSH. Order imaging tests like thyroid ultrasound or nuclear medicine scans which can help determine why your thyroid is making too much thyroid hormone. ... There is a milder form of hyperthyroidism called “subclinical hyperthyroidism”. In Subclinical hyperthyroidism, the TSH is low but the T4 and T3 are normal. Some people may have symptoms from subclinical hyperthyroidism, but many people will not have any symptoms at all.
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Children's Hospital Colorado
childrenscolorado.org › conditions-and-advice › conditions-and-symptoms › conditions › pediatric-hyperthyroidism
Pediatric Hyperthyroidism | Children's Hospital Colorado
This is a rare, but life-threatening condition. It can occur when hyperthyroidism goes untreated or under-treated. Symptoms of a thyroid storm include high fever, fast heart rate, dehydration, confusion/agitation and diarrhea.
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NHS
nhs.uk › conditions › overactive-thyroid-hyperthyroidism
Overactive thyroid (hyperthyroidism) - NHS
lumps (nodules) on the thyroid – this extra thyroid tissue can produce thyroid hormones, causing your levels to be too high
Find elsewhere
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Henry Ford Health
henryford.com › blog › 2021 › 02 › 10-unexpected-symptoms-overactive-thyroid
10 Often-Overlooked Signs Of An Overactive Thyroid | Henry Ford Health - Detroit, MI
February 9, 2021 - “At first, symptoms of hyperthyroidism may be vague and easy to dismiss,” explains Shiri Levy, M.D., an endocrinologist at Henry Ford Health. “Left untreated, a thyroid that has been working overtime can pump thyroid levels so high that organs like the heart and liver go into shock.”
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American Academy of Family Physicians
aafp.org › pubs › afp › issues › 2016 › 0301 › p363.html
Hyperthyroidism: Diagnosis and Treatment | AAFP
March 1, 2016 - Regardless of the cause of hyperthyroidism, the adrenergic symptoms are controlled by beta blockers (Table 5).25–28 Propranolol has the theoretical advantage of also inhibiting 5′-monodeiodinase, thus blocking peripheral conversion of T4 to T3.25 The choice of treatment modality for hyperthyroidism caused by overproduction of thyroid hormones depends on the patient's age, symptoms, comorbidities, and preference.25,26
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NHS inform
nhsinform.scot › home › illnesses and conditions › glands › overactive thyroid
Overactive thyroid symptoms and treatments
March 26, 2025 - Your GP will then test your blood for levels of thyroxine and triiodothyronine. If you have an overactive thyroid, you will have higher than normal levels of both these hormones.
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Verywell Health
verywellhealth.com › hypothyroidism-hyperthyroidism-5180646
Do You Have Hypothyroidism or Hyperthyroidism? Here's How to Tell
December 19, 2025 - The underproduction of T3 and T4 can also cause symptoms affecting your hair, weight, digestion, heart rate, energy levels, moods, body temperature, and menstrual cycle, often in significantly different ways to hyperthyroidism.
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American Medical Association
ama-assn.org › public-health › prevention-wellness › what-doctors-wish-patients-knew-about-hyperthyroidism
What doctors wish patients knew about hyperthyroidism | American Medical Association
July 3, 2025 - Hyperthyroidism is a medical condition ... can lead to a wide range of symptoms, including unexplained weight loss, rapid heartbeat, irritability and difficulty sleeping....
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The Surgical Clinic
thesurgicalclinics.com › signs-thyroid-isnt-working-right
19+ Signs You Have Thyroid Problems | The Surgical Clinic
September 15, 2025 - To better understand if your symptoms point to thyroid issues, take our brief online thyroid symptom test. ... As we mentioned, hyperthyroidism comes from an overactive thyroid gland. When this happens, your body produces an excess of thyroid hormones, such as triiodothyronine (T3) and thyroxine (T4), causing an acceleration of metabolic processes.
Call   +16153297887
Address   410 42nd Ave N Suite 400, 37209, Nashville
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Mayo Clinic
mayoclinic.org › diseases-conditions › hypothyroidism › symptoms-causes › syc-20350284
Hypothyroidism (underactive thyroid) - Symptoms and causes - Mayo Clinic
December 10, 2022 - Understand what happens when your thyroid is underactive and learn about treatment for this condition.
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Yale Medicine
yalemedicine.org › conditions › hyperthyroidism
Hyperthyroidism | Fact Sheets | Yale Medicine
July 24, 2024 - If you take medication that contains iodine or typically eat a high-iodine diet (including seaweed and fish), that is important for doctors to know. During a physical exam, doctors will look for the following signs of hyperthyroidism: ... Hyperthyroidism is usually diagnosed after doctors see the results of simple blood tests. The tests look at the levels of thyroid hormones (T4 and T3) and thyroid stimulating hormone (TSH).
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Penn Medicine
pennmedicine.org › home › conditions we treat › hyperthyroidism
Hyperthyroidism – Symptoms and Causes | Penn Medicine
1 week ago - When this happens, your symptoms suddenly become worse, usually because of an infection or stress. Thyroid crisis is a medical emergency that causes a high fever, stomach pain, and decreased awareness. It’s treated in a hospital. Your thyroid gland produces hormones that regulate your heart ...
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Mayo Clinic
mayoclinic.org › diseases-conditions › hyperthyroidism › diagnosis-treatment › drc-20373665
Hyperthyroidism - Diagnosis and treatment - Mayo Clinic
November 30, 2022 - Understand what happens when your thyroid is overactive and learn about treatment for this condition.
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UCSF Health
ucsfhealth.org › conditions › hyperthyroidism
Hyperthyroidism | Conditions | UCSF Health
Your doctor will first perform a physical examination to check for any obvious symptoms of hyperthyroidism. In addition, your doctor may run other tests, including: Blood tests. Blood tests are performed that measure the levels of the thyroid hormones, T4and T3, which must be high to make a ...
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Healthline
healthline.com › health › hyperthyroidism
Hyperthyroidism: Symptoms, Causes, Treatment, and More
July 8, 2025 - When your thyroid makes too much T3, T4, or both, it · speeds up your body’s systems, causing distress. Timely diagnosis and treatment of hyperthyroidism can relieve symptoms and prevent complications.
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MedlinePlus
medlineplus.gov › home › medical tests
Triiodothyronine (T3) Tests: MedlinePlus Medical Test
You may have slight pain or bruising ... but most symptoms go away quickly. To understand the results of your T3 test, your provider will usually compare them with the results of your TSH and T4 tests. Like T3, T4 tests may measure either free or total T4, but providers usually measure free T4. Your provider will look for different combinations of high, low, and ...