Symptoms That Could Indicate Hyperthyroidism

25. Worsening Vision or Light Sensitivity

While bulging eyes are a more visible sign of Graves’ disease, other ocular symptoms often come first. Hyperthyroidism can cause dry eyes, blurred vision, and even sensitivity to light. You might find it harder to read screens, feel strain under fluorescent lighting, or develop headaches after exposure to bright environments. This happens because the muscles and tissues around the eyes may become inflamed, affecting alignment and moisture regulation. If your eyes suddenly feel more sensitive or strained—and especially if accompanied by pressure or swelling around the orbits—it could be your thyroid sounding the alarm.

26. Unexpected Clumsiness

Dropping your keys more often? Tripping over nothing? Hyperthyroidism can subtly impair coordination. As muscle strength decreases and tremors increase, tasks that once felt automatic—like typing, carrying a glass, or navigating stairs—can feel off. Fine motor skills are particularly affected, making handwriting shaky or buttons trickier to fasten. Combine that with mental restlessness or sleep loss, and your overall steadiness may take a hit. If you’ve been feeling oddly clumsy or accident-prone lately, it might not just be a bad week—it could be your thyroid disrupting your muscle-nerve coordination behind the scenes.