An underactive thyroid, also known as hypothyroidism, occurs when the thyroid gland does not produce enough thyroid hormones. These hormones are responsible for regulating the body’s metabolism, energy levels, and overall growth and development.

When the thyroid gland fails to produce adequate amounts of thyroid hormones, it can lead to a wide range of symptoms that can affect various functions of the body.

It’s important to be aware of these symptoms to seek proper medical attention and management. In this guide, we will explore the common signs and symptoms of an underactive thyroid.

1. Fatigue and Weakness

One of the most common symptoms of an underactive thyroid is constant fatigue and weakness, even after getting enough sleep. Individuals may feel exhausted, lacking energy to perform daily tasks.

This fatigue can significantly impact a person’s quality of life.

2. Weight Gain

Unexplained weight gain is another symptom of an underactive thyroid. The decrease in thyroid hormone production slows down the body’s metabolism, making it harder for individuals to manage their weight.

It can lead to a gradual weight gain, despite following a healthy diet and exercise routine.

3. Mood Swings

An underactive thyroid can affect a person’s mood and mental well-being. Individuals may experience sudden mood swings, depression, irritability, and even memory problems.

These mood changes can be quite unsettling and have a significant impact on daily life.

4. Dry Skin and Hair Loss

The lack of thyroid hormones can lead to dry and itchy skin. This can cause discomfort and may be accompanied by brittle nails.

Additionally, individuals with an underactive thyroid may experience hair loss, including thinning of the hair on the scalp and eyebrows.

5. Cold Sensitivity

An underactive thyroid can affect an individual’s tolerance to cold temperatures. They may feel cold more easily compared to others and may find it challenging to warm up.

This sensitivity to cold can be quite uncomfortable and disrupt daily activities.

6. Constipation

Thyroid hormones play a crucial role in maintaining regular bowel movements. When the production of these hormones decreases, individuals may experience constipation. This can cause bloating, discomfort, and irregularity in bowel movements.

7. Muscle and Joint Pain

People with an underactive thyroid may experience muscle and joint pain. They may feel stiffness and tenderness in various parts of the body, particularly in the arms, legs, and back. This pain can make it difficult to engage in physical activities.

8. Irregular Menstrual Periods

In women, an underactive thyroid can disrupt the menstrual cycle. Periods may become irregular, heavier, or lighter than usual. It can also lead to fertility issues and difficulty conceiving for some women.

9. High Cholesterol Levels

Thyroid hormones are responsible for regulating cholesterol levels in the body. When the thyroid gland is underactive, cholesterol levels may increase.

High levels of cholesterol can increase the risk of developing heart diseases and other cardiovascular conditions.

10. Swelling of the Face and Body

In some cases, individuals with an underactive thyroid may experience puffiness and swelling in the face. This can also extend to other parts of the body, such as the hands, feet, and legs.

This swelling is often a result of fluid retention caused by the underactive thyroid.

It’s important to note that the symptoms of an underactive thyroid can vary from person to person. Some individuals may experience a combination of these symptoms, while others may only experience a few.

If you suspect that you have an underactive thyroid, it’s crucial to consult a healthcare professional for proper diagnosis and treatment.