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With an underactive thyroid, or hypothyroidism, the thyroid does not produce as many hormones as usual. Several symptoms can occur with an underactive thyroid. The MayoClinic.com noted that these symptoms can vary, as they depend on how severe the hormone deficiency is.
The first symptoms of hypothyroidism, such as feeling sluggish or fatigued, may not be very noticeable for patients. The MayoClinic.com stated that as a patient’s metabolism slows further due to the hormone deficiency, she will develop more noticeable symptoms.
Left untreated, the symptoms become more severe over time. In addition to the fatigue and sluggishness, patients may have constipation, muscle weakness and an unexplained weight gain.
Women who have an underactive thyroid may have menstrual periods that are heavier than normal. Patients’ hair and fingernails may become thin and brittle.
Some patients with hypothyroidism may become depressed. Other symptoms of hypothyroidism include having an increased sensitivity to cold, muscle aches and stiffness, muscle weakness, an elevated blood cholesterol level, pale and dry skin, and joint and muscle pain.
As hypothyroidism continues without treatment, patients may develop other symptoms. For example, MedlinePlus noted that patients may develop puffiness in their feet, hands and face.
Patients’ skin may become thicker and their eyebrows may become thinner. Certain senses may become affected.
Late symptoms of hypothyroidism include a decreased sense of smell and taste. Other symptoms include hoarseness and slow speech.
The symptoms of an underactive thyroid can differ in younger patients. For example, in an infant with hypothyroidism, she may have frequent choking and jaundice, which is the yellowing of the whites of the eyes and the skin.
An infant with hypothyroidism may also have a puffy face and a large tongue that protrudes. The MayoClinic.com noted that when hypothyroidism progresses in an infant, it can affect her feeding and developmen.
Untreated cases may result in severe delays in physical and mental capabilities. Other symptoms of an underactive thyroid in infants include excessive sleepiness, constipation and poor muscle tone.
When a child or teenager has an underactive thyroid, she may have a delay in puberty or development of permanent teeth. Hypothyroidism may cause poor growth, which can result in a short stature.
An underactive thyroid may also cause poor mental development in this age group. The MayoClinic.com added that in addition to these symptoms, a child or teenager with the condition may also have symptoms that an adult has.
References
MayoClinic.com. Hypothyroidism. Web. 3 January 2012
http://www.mayoclinic.com/health/hypothyroidism/DS00353/METHOD=print
MedlinePlus Medical Encyclopedia. Hypothyroidism. Web. 3 January 2012
http://www.nlm.nih.gov/medlineplus/ency/article/000353.htm
Reviewed January 3, 2012
by Michele Blacksberg RN
Edited by Jody Smith
Add a Comment5 Comments
I had constipation, Now my skin is dry and hard specially on feet and hands , What is the reasons?
March 30, 2015 - 6:36amThis Comment
I have been looking for answers to mostly all these symptoms for years. I have had thyroid blood tests but they all came up normal, to my surprise. Perhaps my doctor did not give me the right tests. But i know that there is something wrong. I sleep all the time, have had severe hair loss, my memory is getting is so bad it is embarrassing. I do feel like i am in a fog most of the time my concentration is bad. i don't have a very good sense of of smell. the last thing that is very frustrating for me is that i exercise regularly and eat very well and i gain weight. I live in Montreal, Quebec. Can you tell me where i can go to get help.
June 2, 2013 - 7:46amThis Comment
Article is good and quite informative. What is the main reason of constipation?
January 4, 2012 - 3:34amWeb Design Company
This Comment
The reason for constipation is the slowed metabolism caused by Hypothyroidism. ;-D
January 4, 2012 - 6:08amThis Comment
Among the very first symptom in women is unexplained constipation and this happpens in men too but they also get erectile dysfunction.
So once you have these head to a doctor.
January 3, 2012 - 4:42pmThis Comment