The normal value of thyroid stimulating receptor antibody should be <15U/L, so 4.14U/L is a normal condition, there is no such thing as serious or not. Thyrotropin receptor antibody is an antibody that acts directly on the TSH receptor on the membrane of thyroid cells, and its normal value should be <15 U/L, so 4.14 U/L is the normal range of thyrotropin receptor antibody, and there is no such thing as "whether 4.14 is serious or not". Thyrotropin receptor antibodies are important in the diagnosis, treatment and prognosis of toxic diffuse goiter (Graves' disease). Also, thyrotropin receptor antibodies may be positive in patients with hypothyroidism and autoimmune thyroiditis. Thyrotropin receptor antibody tests alone cannot determine the severity of the condition, so please combine them with other thyroid autoantibodies and thyroid function tests. If thyrotropin receptor antibodies are abnormal, go to the hospital for further treatment.