Symptoms of a Hashimoto’s Flare-Up

And what to do about them

Medically reviewed by Kelly Wood, MD

A flare-up of Hashimoto’s disease can cause symptoms of the disease even when you’re being treated for it.

Most of the time when this happens, it’s because you’re not getting enough of the thyroid replacement hormone used to treat the condition. The most common replacement treatment for Hashimoto's is levothyroxine (T4).

Your dose may need to be adjusted to avoid breakthrough Hashimoto’s symptoms. It is possible that something (a supplement or another medication, for example) is interfering with how your body uses the medication.

What Is Hashimoto's Disease?

Hashimoto’s disease, also called Hashimoto’s autoimmune thyroiditis, is an autoimmune thyroid disease in which the immune system mistakenly identifies the thyroid gland as a dangerous pathogen and attacks it. This impairs the thyroid's ability to produce hormones. Hashimoto’s is the most common cause of hypothyroidism in the United States.

Causes

Several different things can interfere with your thyroid function or levothyroxine treatment and trigger a flare-up of Hashimoto’s disease, including:

• Some medications or supplements

• Certain dietary nutrients

• High stress levels

• Incorrect medication dosage

In order to treat your Hashimoto's more effectively, it's important to figure out what's causing your symptoms to act up.

Medications or Supplements

A lot of common medications and nutritional supplements can interfere with how your body absorbs synthetic levothyroxine. Some drugs can also impact the way your body metabolizes thyroid medication. In either case, your body doesn’t get enough of the drug to keep your autoimmune thyroid disease symptoms at bay.

According to studies, including one of more than 5,000 people on thyroid hormone therapy, numerous drugs can interfere with levothyroxine absorption, including:

• Antacids that contain aluminum such as Alamag, Maalox, Mylanta, and Rulox

• Carafate (sucralfate)

• Questran (cholestyramine)

• Renagel, Renvela (sevelamer)

• Cipro, Proquin XR (ciprofloxacin)

• Evista (raloxifene)

• Alli, Xenical (orlistat)

• Proton pump inhibitors such as Prevacid (lansoprazole), Prilosec (omeprazole), and Nexium (esomeprazole)

Drugs that can alter the way your body metabolizes levothyroxine include:

• Carbatrol, Tegretol (carbamazepine)

• Phenobarbital

• Dilantin (phenytoin)

• Gleevec (imatinib)

• Estrogens such as Premarin, Estrace, Estratab

• Cordarone, Pacerone (amiodarone)

• Rifadin, Rimactane (rifampicin)

Nutritional supplements that can interfere with thyroid hormone replacement include:

• Calcium carbonate

• Iodine

• Iron

• Multivitamins containing calcium and iron

• Supplements containing soy extracts

Related: An Overview of Thyroid Disease Treatments

Stress

Stressful events or chronically high stress levels can aggravate your immune system and increase autoimmune activity. It’s possible that stress could affect the activity of Hashimoto’s disease.

Don’t just assume your flare-up is stress-related, though. If you have ongoing symptoms of Hashimoto’s, let your healthcare provider know so they can check for other possible causes.

Incorrect Dosage

You may be having Hashimoto’s symptoms because you’re not on the right dosage of levothyroxine. When you first begin treatment for hypothyroidism, it’s common to need a few adjustments to your dosage before you reach a symptom-free state.

Early on, or after a dose adjustment, your healthcare provider may test your thyroid hormone levels every six to eight weeks. Once your ideal dosage is reached, you may only need to be tested once a year.

However, if you begin having symptoms of low thyroid hormone, you may need a higher dosage and the associated regular testing until symptoms are once again under control.

Why Treat With T3 Instead of T4?

T4 is an inactive hormone that your body converts to T3 (triiodothyronine), which is the active form. Healthcare providers prescribe T4 to allow your tissues to make that conversion when and where it’s needed.

This approach is effective for many people with thyroid disease, but evidence suggests some people's bodies don’t convert T4 to T3 efficiently, so they may need to be treated with synthetic T3 (liothyronine) in addition to T4.

Another formulation of T3 and T4, known as Armour Thyroid, is made from the desiccated thyroids of animals (usually pigs). Some people find this more effective than synthetic formulations. However, Armour Thyroid has been found to have side effects, including heart palpitations, loss of appetite, and anxiety in some people.

Symptoms

In a Hashimoto’s flare-up, you’ll begin having symptoms of hypothyroidism, which include:

• Fatigue

• Weight gain

• Frequently feeling cold

• Difficulty exercising

• Dry skin and hair

• Muscle and joint aches

• Depression

• Constipation

• Memory problems

• Irregular menstrual periods

• Slow heart rate

Fatigue and Thyroid Disease

One of the primary symptoms you’re likely to experience during a Hashimoto’s symptom flare-up is fatigue. The fatigue of thyroid disease isn’t like ordinary tiredness and may have a significant impact on your life.

When to See a Healthcare Provider

Flare-ups shouldn't happen when you’re on the correct dose of levothyroxine. Any time you have a resurgence of Hashimoto’s symptoms, you should let your healthcare provider know. They may want to change your dosage, look for things that could be interfering with your treatment, or test for other potential causes of your symptoms.

Treatment

Treatment for a Hashimoto’s flare-up depends on what’s behind the increase in symptoms.

Timing Is Key

If a medication or supplement is hampering your body’s ability to utilize levothyroxine, you may need to change the timing of your medications. Sometimes, simply taking the interfering medication at least an hour after your levothyroxine will allow your body to fully absorb the medication. If you take your thyroid drug in the morning, you may have better luck taking your other medications at night.

The timing of your thyroid medication can be affected by a lot of different factors, including other drugs you take and even what you eat for breakfast, so before changing the time of day you take your levothyroxine, talk to your healthcare provider about it.

Other Approaches

There are other ways to manage a Hashimoto's flare-up:

• In some cases, your healthcare provider may advise you to stop a medication or replace it with a different drug.

• With proton pump inhibitors, research shows that taking an oral levothyroxine solution instead of tablets may improve absorption.

• If you have a nutrient deficiency, you may need to take supplements or change your diet to bring your levels up and improve your thyroid function.

• For stress-related thyroid flare-ups, some preliminary research suggests that mindfulness meditation may improve immune system function.

Related: How to Take Your Thyroid Medication Properly

Summary

Even if your Hashimoto's disease is being treated with thyroid replacement hormone, you may experience flare-ups of symptoms. This can result from not being on the correct dosage of levothyroxine, or due to other medications and/or supplements that can interfere with levothyroxine absorption.

If you notice that your symptoms are flaring up, your healthcare provider can help you identify the problem and come up with a solution.

Read the original article on Verywell Health.