Constipation is not a symptom of Graves disease, which is associated with many health problems but particularly with diarrhea and thyroid problems.
Patients with Graves' disease often suffer diarrhea, which is a conversely symptom of consumption. This health problem can aggravate the disease due to the excessive loss of water from the body and thus lead to a problem of dehydration.
It is important to remember that Graves disease refers to a special type of autoimmune disease associated with the thyroid (hyperthyroidism), which leads to problems associated with dysregulated body temperature, among others (e.g., dysregulation of the amount of iodine in the body secretions).