What are the symptoms of high ferritin need to be judged according to the cause of high ferritin, different causes of symptoms are different, common symptoms include fever, cough, pain and so on. In some patients, high ferritin may be caused by inflammation, which may generally result in fever, cough, abdominal pain, and diarrhea. Some patients may also have high ferritin due to autoimmune disorders, such as rheumatoid arthritis and diabetes, which may lead to high ferritin. Patients with rheumatoid arthritis may experience redness, swelling and pain in the joints; patients with diabetes may drink more, eat more and urinate more. If high ferritin is detected, it is recommended to consult a doctor promptly for examination, understand the causes of elevated ferritin, and then follow the doctor’s instructions for treatment.