What are hypothyroidism and hyperthyroidism?
How we can identify them?

Question

When the thyroid produces more thyroid hormones than the body needs, that is the definition of hyperthyroidism, or overactive thyroid. The most common cause of hyperthyroidism Is Graves’ disease, a disorder where the body’s immune system stimulates the thyroid too much.
Symptoms of hyperthyroidism usually begin slow, making them hard to notice. Over time an excessive metabolism may result in unwanted/unhealthy weight loss, rapid or irregular heartbeat, irritability, anxiety, trouble sleeping, increased sweating, muscle weakness and less frequent menstrual periods for females.
When the thyroid does not produce enough thyroid hormones for the body, that is the definition of hypothyroidism, or underactive thyroid. The most common cause of hypothyroidism is Hasimoto’s disease, a disorder where the immune system actually attacks the thyroid. Other causes of hypothyroidism can include thyroid removal, some radiation treatment of certain cancers and even treatment for hyperthyroidism.
Symptoms of hypothyroidism usually begin slow, making them hard to notice. At first you may just feel a little tired or sluggish. Other symptoms that may develop later include uncontrolled weight gain, joint or muscle pain, increased sensitivity to cold, depression, pale skin, a puffy face, a hoarse voice and excessive menstrual bleeding for females.

Anuradha S.Kumar · Accepted Answer

When the thyroid produces more thyroid hormones than the body needs, that is the definition of hyperthyroidism, or overactive thyroid. The most common cause of hyperthyroidism Is Graves’ disease, a disorder where the body’s immune system stimulates the thyroid too much.
Symptoms of hyperthyroidism usually begin slow, making them hard to notice. Over time an excessive metabolism may result in unwanted/unhealthy weight loss, rapid or irregular heartbeat, irritability, anxiety, trouble sleeping, increased sweating, muscle weakness and less frequent menstrual periods for females.
When the thyroid does not produce enough thyroid hormones for the body, that is the definition of hypothyroidism, or underactive thyroid. The most common cause of hypothyroidism is Hasimoto’s disease, a disorder where the immune system actually attacks the thyroid. Other causes of hypothyroidism can include thyroid removal, some radiation treatment of certain cancers and even treatment for hyperthyroidism.
Symptoms of hypothyroidism usually begin slow, making them hard to notice. At first you may just feel a little tired or sluggish. Other symptoms that may develop later include uncontrolled weight gain, joint or muscle pain, increased sensitivity to cold, depression, pale skin, a puffy face, a hoarse voice and excessive menstrual bleeding for females.

What are hypothyroidism and hyperthyroidism? How we can identify them?