Type 2 diabetes symptoms mainly include typical symptoms such as polyuria, polydipsia, polyphagia, weight loss, and in some cases, manifestations of complications such as blurred vision and numbness in the lower limbs. There are also patients who may have no obvious symptoms. Typical symptoms of type 2 diabetes mellitus mainly refer to three more and one less, i.e. polyuria, polydipsia, polyphagia, and weight loss. These symptoms are usually easy to appear in the early stage of diabetes and when the blood sugar is too high, which are the typical symptoms of diabetes. When type 2 diabetes is not well controlled or for a longer period of time, complications of diabetes are likely to occur. For example, diabetic retinopathy can present with blurred vision, a foreign body sensation in front of the eyes, and may lead to blindness in severe cases. Diabetic neuropathy can present with numbness, pain, and abnormal sensation in both lower limbs. When the symptoms of diabetes appear, you should go to the hospital in a timely manner, and should not carry out a simple evaluation of medication on your own.