About Myxedema in Hypothyroidism (Underactive Thyroid)
The disease cause of myxedema is not fully understood, but it is believed to be linked to prolonged stimulation of fibroblasts by thyroid-stimulating hormone (TSH). This mechanism is similar to the action of TSH receptor antibodies in Graves' disease, which can also lead to myxedema.
The non-modifiable risk factors for myxedema cannot be changed or controlled. These include:
- Untreated hypothyroidism: Having hypothyroidism that is not properly managed or treated increases the risk of developing myxedema.
- Age: Older adults, aged 60 or above, are at a higher risk.
- Sex: Women are more susceptible to hypothyroidism and myxedema than men.
- Pregnancy: The hormonal changes during pregnancy can increase the risk.
- Cold weather: Myxedema is more common during cold winter months.
The modifiable risk factors for myxedema can be influenced or changed. These include:
- Poor dietary habits: Maintaining a healthy diet is important in managing thyroid function.
- Low physical activity: Regular exercise can help support overall health, including thyroid function.
- Stressful or traumatic events: Managing stress levels and seeking support during difficult times may help reduce the risk.
It's important to note that these risk factors may increase the likelihood of developing myxedema, but they do not guarantee its occurrence. It's always best to consult with a healthcare professional for personalized advice and management.
The early symptoms of myxedema can vary, but some common ones include:
- Trouble regulating body temperature
- Unexplained weight loss or gain
- Dry skin
- Irregular heart rate
As myxedema progresses or becomes more severe, additional symptoms may occur. These can include:
- Swollen skin, often noticeable in the face, hands, feet, or lower legs
- Waxy appearance of the skin
- Lesions on the skin
- Pits in the skin when pressed
- Orange peel-like appearance of the skin
- Fatigue and tiredness
- Decreased mobility
- Low body temperature (hypothermia)
- Intolerance to cold
- Coarse hair
- Goiter (enlarged thyroid gland)
- Reduced mental clarity and altered states of consciousness
It's important to note that severe cases of myxedema can progress to a life-threatening condition called myxedema coma. This can cause further symptoms such as confusion, shock, seizures, and even coma. If you experience any symptoms of myxedema or severe hypothyroidism, it's crucial to seek immediate medical attention.
To diagnose myxedema, healthcare providers commonly perform the following examinations, tests, and procedures:
- Physical exam: The healthcare professional looks for swelling in the face, hands, or feet, dry or thickened skin, brittle hair, and a slow heart rate.
- Blood tests: These measure thyroid hormone levels and thyroid-stimulating hormone (TSH) levels. Low levels of thyroid hormones and high levels of TSH can indicate hypothyroidism.
- Thyroxine (T4) test: This measures T4 levels in the blood. Low T4 levels combined with high TSH levels can indicate hypothyroidism.
- Additional tests to measure thyroid function and find underlying causes: These may be performed if hypothyroidism is suspected. They can include more blood tests and imaging scans of the heart and other organs.
To determine the severity of myxedema, additional examinations, tests, and procedures may be recommended:
- Imaging studies (X-rays or MRI (magnetic resonance imaging) scans): Used to check for organ damage and assess complications caused by severe myxedema.
- Electrocardiogram (ECG): This test measures the electrical activity of the heart to evaluate its function.
- Blood tests: These may be done to check for signs of infection and kidney problems.
It's important to follow up with your healthcare provider if any symptoms worsen or change after the initial physical exam. They will guide you through the necessary examinations and tests for an accurate diagnosis.
The goals of treatment for myxedema include:
- Restoring thyroid hormone levels: The synthetic version of the T4 hormone called levothyroxine is used to treat hypothyroidism associated with myxedema. This medication helps restore T4 hormone levels, which can alleviate symptoms and improve overall well-being.
- Managing symptoms: Treatment focuses on managing symptoms associated with myxedema. For example, individuals may require warming blankets to maintain a healthy body temperature. Breathing assistance, such as continuous positive airway pressure (CPAP), may be necessary if carbon dioxide levels in the blood are elevated. Monitoring heart rhythms and blood pressure is also important.
- Administering supportive care: People with severe cases of myxedema, such as myxedema coma, require intensive care unit (ICU) admission. In addition to thyroid hormone replacement medication, antibiotics, steroid treatment, and breathing support may be provided to address symptoms and complications.
It's important to note that these treatment options should be discussed with a healthcare professional. They can provide personalized advice based on an individual's specific condition and medical history.
Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.