Thyroid disorders affect millions of people worldwide, yet many remain undiagnosed because the symptoms are often subtle and mistaken for other conditions. The thyroid gland, a butterfly-shaped organ in your neck, produces hormones that regulate metabolism, energy, and many bodily functions.

1. Unexplained Fatigue

Feeling tired despite getting adequate sleep is one of the most common signs of hypothyroidism. When your thyroid is underactive, your body's metabolism slows down, leaving you feeling exhausted.

2. Weight Changes

Unexplained weight gain is associated with hypothyroidism, while sudden weight loss may indicate hyperthyroidism. If your diet and exercise habits haven't changed but your weight has, consider getting your thyroid checked.

3. Hair Loss

Both hypothyroidism and hyperthyroidism can cause hair thinning and loss. The hair may become dry, brittle, and coarse.

4. Mood Changes

Thyroid hormones affect brain chemistry. Hypothyroidism is often linked to depression, while hyperthyroidism can cause anxiety, irritability, and nervousness.

5. Temperature Sensitivity

Feeling unusually cold (hypothyroidism) or hot (hyperthyroidism) can be a sign of thyroid dysfunction.

6. Irregular Heartbeat

Hyperthyroidism can cause a rapid or irregular heartbeat, while hypothyroidism may result in a slower than normal heart rate.

7. Changes in Menstrual Cycle

Women with thyroid disorders often experience heavier, more painful periods (hypothyroidism) or lighter, less frequent periods (hyperthyroidism).