Hypothyroidism Symptoms in Men

Men with hypothyroidism (underactive thyroid) may experience an increased risk of erectile dysfunction, hair loss, reduced fertility, and other issues.
With hypothyroidism the thyroid gland doesn’t produce enough thyroid hormones. This can cause changes throughout the body, including some gender-specific symptoms.
Untreated hypothyroidism can affect the length and quality of a person’s life. But therapies to manage hypothyroidism, including medication and non-drug approaches, can make a real difference.
7 Important Health Checks for People With Hypothyroidism
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What Is Hypothyroidism?
Hypothyroidism happens when the thyroid gland doesn’t produce enough thyroid hormone.
- Hashimoto’s disease, an autoimmune condition in which the body mistakenly attacks healthy thyroid cells
- Thyroiditis, or inflammation of the thyroid (typically from a virus)
- Congenital hypothyroidism, which is present from birth
- Surgery to remove the thyroid gland
- Radiation therapy to the neck or thyroid gland
- Some medications
- Body weight
- Energy levels
- Temperature
- Skin, hair, and nail growth
- Muscle control
- Brain function
- Bone health
- Heart rate
Too little T3 and T4 can lead to a wide range of symptoms, including:
- Weight gain
- Increased appetite
- Irritability
- Thinning hair
- Slow heart rate
- Fatigue
- Sexual dysfunction and reduced fertility
- Feeling cold
An underactive thyroid can also affect metabolism — the process by which cells convert calories from food and drink into energy for the body to use.
Hypothyroidism Symptoms in Men
Here’s a look at how an underactive thyroid can affect men.
Physical Symptoms
- Fatigue and low energy
- Weight gain
- Muscle weakness
- Cold intolerance
- A hoarse voice
- Drooping eyelids or puffiness around the eyes
- Brittle, crumbly, or breaking nails
- Dry skin and hair
- Hair loss
Hair loss from hypothyroidism in men is different from male pattern hair loss, in which the hair thins from the front and top.
Sexual Health
- Reduced fertility
- Erectile dysfunction
- Low libido
Fatigue, low mood, and weight gain can contribute to low libido. But decreased sex drive may also happen because low thyroid activity affects other hormones, such as testosterone.
More research is necessary to better understand hypothyroidism’s effect on fertility, but there appears to be a link. It may be that thyroid dysfunction affects the production of sperm and testosterone and sperm quality.
Cognitive Symptoms
Hypothyroidism may lead to:
- Brain fog
- Memory lapses
- Difficulty concentrating
- Loss of interest and mental alertness
Emotional Symptoms
Hypothyroidism can cause:
- Depression
- Mood changes
- Negative body image
- Overt autoimmune hypothyroidism (a more severe form)
- Subclinical or mild autoimmune hypothyroidism
- No thyroid problems
The researchers concluded that men with overt autoimmune hypothyroidism had issues with sexual health and mood, and those with mild hypothyroidism had problems with erectile function only.
Marilyn Tan, MD, an endocrinologist and clinical associate professor of medicine at Stanford Health Care in California, says, “Overt hypothyroidism can lead to mood changes and changes in mentation [mental activity] in very severe cases. In addition, if one develops weight gain, hair loss, loss of muscle mass, and other symptoms of overt hypothyroidism, this can affect self-image and also mental health.”
How Symptoms Differ in Men and Women
“In both men and women, classic symptoms of overt hypothyroidism include weight gain, fatigue, dry skin and nails, hair loss, constipation, cold intolerance, mental fogginess, and mood changes,” Dr. Tan says. “In women, menstrual periods can be irregular or different in nature, and fertility may be affected; in men, libido and sexual function may be impacted.”
Tan also notes that most discussions about hypothyroidism focus on women, not only because the condition is more common in females, but because of the potential consequences for pregnancy.
Risk Factors for Hypothyroidism in Men
- Having another autoimmune disease
- A family history of hypothyroidism
- A history of thyroid surgery or radiation to the head or neck
- The use of certain medications
- Older age
Treatment Options for Hypothyroidism
Options for treating hypothyroidism are the same for men and women and include the following.
Medication
Levothyroxine is the main hypothyroidism treatment, stabilizing levels of the thyroid hormones T3 and T4. People who take levothyroxine should undergo regular blood tests to confirm that thyroid doses are appropriate as requirements can change over time. Too much can also be harmful.
Lifestyle Strategies
A nutritious diet and exercise can boost overall mental and physical well-being and may help manage the symptoms of hypothyroidism.
Diet A nutritious diet involves a range of foods and nutrients, including plenty of fruits, vegetables, and whole grains.
Ask a doctor about foods to avoid and foods to include. It can also be helpful to speak with a dietitian about healthy ways to manage weight.
A suitable program may also help manage fatigue, weight gain, heart rhythm changes, muscle weakness, and other symptoms.
If a person is not in the habit of exercising, they may need to build up stamina over time.
Complementary Therapies
Complementary therapies for hypothyroidism include acupuncture, massage, and meditation.
Various life hacks can also help manage sensitivity to cold, fatigue, and other symptoms.
Monitoring and Follow-Up
People with hypothyroidism need regular checkups to ensure their medication doses are still suitable and to review the progress of any symptoms.
Attending these appointments is crucial for keeping T3 and T4 levels stable and at the right level. It also offers the chance to discuss any side effects, new symptoms, or other concerns.
The Takeaway
- Hypothyroidism (underactive thyroid) occurs when the thyroid gland doesn’t produce enough thyroid hormone.
- Most symptoms affect both men and women. However, some symptoms are unique to men, such as sexual and erectile dysfunction.
- Other symptoms include weight gain, depression, and loss of muscle strength.
- Treatment with levothyroxine can manage symptoms by adjusting thyroid hormone levels.
Common Questions & Answers

Elise M. Brett, MD
Medical Reviewer
Dr. Brett practices general endocrinology and diabetes and has additional certification in neck ultrasound and fine-needle aspiration biopsy, which she performs regularly in the office. She is voluntary faculty and associate clinical professor at the Icahn School of Medicine at Mount Sinai. She is a former member of the board of directors of the American Association of Clinical Endocrinology. She has lectured nationally and published book chapters and peer reviewed articles on various topics, including thyroid cancer, neck ultrasound, parathyroid disease, obesity, diabetes, and nutrition support.

Yvette Brazier
Author
Yvette Brazier's career has focused on language, communication, and content production, particularly in health education and information. From 2005 to 2015, she supported learning in the health science department of a higher education establishment, teaching the language of health, research, and other language application skills to paramedic, pharmacy, and medical imaging students.
From 2015 to 2023, Yvette worked as a health information editor at Medical News Today and Healthline. Yvette is now a freelance writer and editor, preparing content for Everyday Health, Medical News Today, and other health information providers.
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