Fatigue, mood swings, more: 10 Symptoms of Hypothyroidism

By Rajeshwaari Kalla | September 15, 2025 | Image: Canva

Constant fatigue

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You may feel tired all the time, even after a full night’s sleep. It’s one of the earliest signs of low thyroid activity

Unexplained weight gain

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Gaining weight despite eating  normally or being physically active  could point to an underactive thyroid slowing your metabolism

Sensitivity to cold

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Feeling unusually cold, especially in hands and feet, is a typical symptom as body temperature regulation is impaired

Dry skin and thinning hair

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Your skin may become flaky or rough, and your hair may fall out more easily or appear thinner than usual

Muscle and joint pain

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Aches, cramps, or stiffness in your muscles and joints can occur, even without intense physical activity or injury

Slow heart rate

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Hypothyroidism can cause a slower-than-normal heart rate (bradycardia), leading to fatigue, dizziness, or low energy levels

Depression or low mood

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Low thyroid hormone levels can affect brain chemistry, leading to mood swings, sadness, or clinical depression in some

Menstrual irregularities

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Periods may become heavier, longer, or more painful. Some also experience infertility related to thyroid dysfunction

Poor concentration

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Difficulty focusing, forgetfulness, and mental sluggishness — often called “brain fog” — are frequently reported symptoms

Hoarseness or puffy face

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A hoarse voice and puffiness around the eyes or face can also develop due to fluid retention and hormonal imbalance

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