(i) Hyperthyroidism is increased levels of thyroid hormones whereas hypothyroidism is decreased levels of thyroid hormones.
(ii) Hyperthyroidism can lead to Grave's disease whereas hypothyroidism does not produce these diseases.
(iii) There is faster metabolism in hyperthyroidism while there is a slow metabolism in hypothyroidism.
(iv) Hypothyroidism is treated by supplements of thyroid hormones and hyperthyroidism is treated by anti-thyroid drugs.
(v) Hypothyroidism shows decreased levels of T3 and T4 and increased levels of TSH whereas in hyperthyroidism, there is an increased levels of T3 and T4 and a decreased level of TSH.
