From Thyroid to Stress: 13 Hidden Reasons Behind Unexplained Weight Gain

One of the most common hidden causes is hypothyroidism. The thyroid, a butterfly-shaped gland in your neck, plays a crucial role in regulating metabolism. When it’s underactive, your body burns energy more slowly, leading to gradual weight gain. Other symptoms may include fatigue, dry skin, hair loss, muscle cramps, and constipation. This condition is especially prevalent among women, with about one in eight affected during their lifetime.