Link to Graves’ disease. One of the most common reasons why people get hyperthyroidism is from an immune disorder called Graves’ disease. Graves’ disease commonly affects women under the age of 40. When a person has Graves’ disease, they will have all the symptoms of hyperthyroidism. For some people, they develop a disorder called Graves’ ophthalmopathy. This condition affects the eyes. Symptoms include a gritty feeling behind the eye, pain in the eye, pressure in the eye, redness or inflammation of the eye, puffiness of your eyelid, sensitivity to light, double vision, loss of vision, and bulging of the eyes. Graves’ disease will need to be treated as soon as possible for the relief of these symptoms.