Underactive thyroid (hypothyroidism)
Hypothyroidism occurs when the thyroid gland does not produce enough thyroid hormones. This tends to slow down the body's functions. Symptoms include tiredness, constipation and sensitivity to the cold.
overactive thyroid (Hyperthyroidism)
Hyperthyroidism is a condition in which an overactive thyroid gland is producing an excessive amount of thyroid hormones that circulate in the blood. ("Hyper" means "over" in Greek). Thyrotoxicosis is a toxic condition that is caused by an excess of thyroid hormones from any cause. Thyrotoxicosis can be caused by an excessive intake of thyroid hormone or by overproduction of thyroid hormones by the thyroid gland.
In hypothyroidism, the thyroid is under active, with too little of the thyroid hormones being released. In contrast, hyperthyroidism occurs when there is over-production of T3 and T4, causing the body's metabolism to "speed up". This results in symptoms such as anxiety and feeling hot, even in cool weather.
2006-12-25 07:22:11
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answer #1
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answered by ? 6
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2016-12-01 04:10:21
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answer #2
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answered by santella 4
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They are opposite from each other usually. With underactive there would be constipation, with overactive diarrhea. Underactive weight gain, overactive weight loss. Underactive slow heart rate, overactive fast heart rate. I think you get the idea.
If you want more info on underactive just look up Hypothyrodism. For overactive look up hyperthyroidism.
2006-12-25 07:26:17
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answer #3
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answered by DNA 6
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Instead of asking for information to be handed to you, you have the entire Internet to search through to get information for yourself. Use it.
2006-12-25 07:31:02
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answer #4
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answered by TweetyBird 7
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skinny vs fat. most ppl who laim they are fat because of their thyroid are full of sh*iit. They are fat because they eat like pigs and are not very active.
2006-12-25 07:12:43
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answer #5
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answered by Anonymous
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