Hyperthyroidism

thyrotoxicosishyperthyroidoveractive thyroidFeline hyperthyroidismThyroid crisishyperhyper''thyroidismhyper-hyperactive thyroidhyperactive thyroid gland
Hyperthyroidism is the condition that occurs due to excessive production of thyroid hormone by the thyroid gland.wikipedia
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Thyroid

thyroid glandthyroid folliclethyroid function
Hyperthyroidism is the condition that occurs due to excessive production of thyroid hormone by the thyroid gland.
Thyroid disorders include hyperthyroidism, hypothyroidism, thyroid inflammation (thyroiditis), thyroid enlargement (goitre), thyroid nodules, and thyroid cancer.

Thyroid storm

thyrotoxic crisis
An uncommon complication is thyroid storm in which an event such as an infection results in worsening symptoms such as confusion and a high temperature and often results in death. Psychosis and paranoia, common during thyroid storm, are rare with milder hyperthyroidism.
Thyroid storm is a rare but severe and potentially life-threatening complication of hyperthyroidism (overactivity of the thyroid gland).

Graves' disease

Graves diseaseGrave's diseaseGraves’ disease
Graves' disease is the cause of about 50% to 80% of the cases of hyperthyroidism in the United States. Major clinical signs include weight loss (often accompanied by an increased appetite), anxiety, heat intolerance, hair loss (especially of the outer third of the eyebrows), muscle aches, weakness, fatigue, hyperactivity, irritability, high blood sugar, excessive urination, excessive thirst, delirium, tremor, pretibial myxedema (in Graves' disease), emotional lability, and sweating.
It frequently results in and is the most common cause of hyperthyroidism.

Diarrhea

diarrhoeadiarrheal diseaseschronic diarrhea
Signs and symptoms vary between people and may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, enlargement of the thyroid, hand tremor, and weight loss. In addition, those with hyperthyroidism may present with a variety of physical symptoms such as palpitations and abnormal heart rhythms (the notable ones being atrial fibrillation), shortness of breath (dyspnea), loss of libido, amenorrhea, nausea, vomiting, diarrhea, gynecomastia and feminization.
These include lactose intolerance, irritable bowel syndrome, non-celiac gluten sensitivity, celiac disease, inflammatory bowel disease such as ulcerative colitis, hyperthyroidism, bile acid diarrhea, and a number of medications.

Goitre

goitermultinodular goitergoiters
Signs and symptoms vary between people and may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, enlargement of the thyroid, hand tremor, and weight loss. Other causes include multinodular goiter, toxic adenoma, inflammation of the thyroid, eating too much iodine, and too much synthetic thyroid hormone.
A goiter, if associated with hypothyroidism or hyperthyroidism, may be present with symptoms of the underlying disorder.

Tachycardia

fast heart rateincreased heart raterapid heart rate
Signs and symptoms vary between people and may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, enlargement of the thyroid, hand tremor, and weight loss.
Hyperthyroidism can also cause tachycardia.

Tremor

tremblingshakingmuscle tremor
Signs and symptoms vary between people and may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, enlargement of the thyroid, hand tremor, and weight loss. These include fast heart beat and symptoms of palpitations, nervous system tremor such as of the hands and anxiety symptoms, digestive system hypermotility, unintended weight loss, and (in "lipid panel" blood tests) a lower and sometimes unusually low serum cholesterol. Neurological manifestations can include tremors, chorea, myopathy, and in some susceptible individuals (in particular of Asian descent) periodic paralysis. Major clinical signs include weight loss (often accompanied by an increased appetite), anxiety, heat intolerance, hair loss (especially of the outer third of the eyebrows), muscle aches, weakness, fatigue, hyperactivity, irritability, high blood sugar, excessive urination, excessive thirst, delirium, tremor, pretibial myxedema (in Graves' disease), emotional lability, and sweating.
Tremors can also be seen in infants with phenylketonuria (PKU), overactive thyroid or liver failure.

Thyroiditis

resolving thyroiditisthyroiditis, suppurativeinflammation of the thyroid
Other causes include multinodular goiter, toxic adenoma, inflammation of the thyroid, eating too much iodine, and too much synthetic thyroid hormone.
On the other hand, if the thyroid cell damage is acute, the thyroid hormone within the gland leaks out into the bloodstream causing symptoms of thyrotoxicosis, which is similar to those of hyperthyroidism.

Thiamazole

methimazoleTapazole
Medications such as beta blockers may control the symptoms, and anti-thyroid medications such as methimazole may temporarily help people while other treatments are having effect.
Thiamazole, also known as methimazole, is a medication used to treat hyperthyroidism.

Hypothyroidism

hypothyroidhypo-underactive thyroid
The opposite is hypothyroidism, when the thyroid gland does not make enough thyroid hormone.
This is characterized by a short period of hyperthyroidism followed by a period of hypothyroidism; 20–40% remain permanently hypothyroid.

Panic attack

panic attacksanxiety attackanxiety attacks
Panic attacks, inability to concentrate, and memory problems may also occur.
Before diagnosis, conditions that produce similar symptoms should be ruled out, such as hyperthyroidism, hyperparathyroidism, heart disease, lung disease, and drug use.

Palpitations

palpitationheart palpitationsheart palpitation
These include fast heart beat and symptoms of palpitations, nervous system tremor such as of the hands and anxiety symptoms, digestive system hypermotility, unintended weight loss, and (in "lipid panel" blood tests) a lower and sometimes unusually low serum cholesterol. In addition, those with hyperthyroidism may present with a variety of physical symptoms such as palpitations and abnormal heart rhythms (the notable ones being atrial fibrillation), shortness of breath (dyspnea), loss of libido, amenorrhea, nausea, vomiting, diarrhea, gynecomastia and feminization.
Palpitation may be associated with coronary heart disease, hyperthyroidism, diseases affecting cardiac muscle such as hypertrophic cardiomyopathy, diseases causing low blood oxygen such as asthma and emphysema; previous chest surgery; kidney disease; blood loss and pain; drugs such as antidepressants, statins, alcohol, nicotine, caffeine, cocaine and amphetamines; electrolyte imbalances of magnesium, potassium and calcium; and deficiencies of nutrients such as taurine, arginine and iron.

Atrial fibrillation

atrial fibrilationparoxysmal atrial fibrillationAtrial fibrillation with rapid ventricular response
In addition, those with hyperthyroidism may present with a variety of physical symptoms such as palpitations and abnormal heart rhythms (the notable ones being atrial fibrillation), shortness of breath (dyspnea), loss of libido, amenorrhea, nausea, vomiting, diarrhea, gynecomastia and feminization.
Other factors include excess alcohol intake, tobacco smoking, diabetes mellitus, and thyrotoxicosis.

Heat intolerance

heat sensitiveSensitivity to heat
Signs and symptoms vary between people and may include irritability, muscle weakness, sleeping problems, a fast heartbeat, heat intolerance, diarrhea, enlargement of the thyroid, hand tremor, and weight loss. Major clinical signs include weight loss (often accompanied by an increased appetite), anxiety, heat intolerance, hair loss (especially of the outer third of the eyebrows), muscle aches, weakness, fatigue, hyperactivity, irritability, high blood sugar, excessive urination, excessive thirst, delirium, tremor, pretibial myxedema (in Graves' disease), emotional lability, and sweating.
Excess thyroid hormone, which is called thyrotoxicosis, is the most common cause.

Thyrotoxic periodic paralysis

periodic paralysisThyrotoxic hypokalaemic periodic paralysis
Neurological manifestations can include tremors, chorea, myopathy, and in some susceptible individuals (in particular of Asian descent) periodic paralysis.
Thyrotoxic periodic paralysis (TPP) is a condition featuring attacks of muscle weakness in the presence of hyperthyroidism (overactivity of the thyroid gland).

Osteoporosis

bone lossosteoporoticpostmenopausal osteoporosis
Long term untreated hyperthyroidism can lead to osteoporosis.
Osteoporosis may also occur due to a number of diseases or treatments, including alcoholism, anorexia, hyperthyroidism, kidney disease, and surgical removal of the ovaries.

Hyperthermia

heat stresshyperthermicheat stroke
An uncommon complication is thyroid storm in which an event such as an infection results in worsening symptoms such as confusion and a high temperature and often results in death.
Other rare causes of hyperthermia include thyrotoxicosis and an adrenal gland tumor, called pheochromocytoma, both of which can cause increased heat production.

Psychosis

psychoticpsychosespsychotic break
Psychosis and paranoia, common during thyroid storm, are rare with milder hyperthyroidism.

Dalrymple's sign

Dalrymple signDalrymple disease
In hyperthyroid stare (Dalrymple sign) the eyelids are retracted upward more than normal (the normal position is at the superior corneoscleral limbus, where the "white" of the eye begins at the upper border of the iris).
Dalrymple's sign is a widened palpebral (eyelid) opening, or eyelid spasm, seen in thyrotoxicosis (as seen in Graves' disease, exophthalmic Goitre and other hyperthyroid conditions), causing abnormal wideness of the palpebral fissure.

Toxic multinodular goitre

toxic multinodular goiterPlummer's diseasetoxic nodular goiter
Toxic multinodular goiter is an active multinodular goiter associated with hyperthyroidism.

Iodine-131

131 II-131radioiodine therapy
There are three main treatment options: radioiodine therapy, medications, and thyroid surgery.
The ingestion of prophylaxis iodide and iodate is not without its dangers, There is reason for caution about taking potassium iodide or iodine supplements, as their unnecessary use can cause conditions such as the Jod-Basedow phenomena, and the Wolff-Chaikoff effect, trigger and/or worsen hyperthyroidism and hypothyroidism respectively, and ultimately cause temporary or even permanent thyroid conditions.

Subacute thyroiditis

Subacute thyroiditis is a form of thyroiditis that can be a cause of both thyrotoxicosis and hypothyroidism.

Triiodothyronine

T 3 T3triiodothyronine (T3)
Typically blood tests show a low thyroid stimulating hormone (TSH) and raised T 3 or T 4.
The latter two effects act to produce the typical bounding pulse seen in hyperthyroidism.

Anxiety

anxiousnervousnessanxieties
These include fast heart beat and symptoms of palpitations, nervous system tremor such as of the hands and anxiety symptoms, digestive system hypermotility, unintended weight loss, and (in "lipid panel" blood tests) a lower and sometimes unusually low serum cholesterol.
[10][49] Other problems that may result in similar symptoms include hyperthyroidism, heart disease, caffeine, alcohol, or cannabis use, and withdrawal from certain drugs, among others.

Delirium

deliriousconfusionAcute confusional state
Major clinical signs include weight loss (often accompanied by an increased appetite), anxiety, heat intolerance, hair loss (especially of the outer third of the eyebrows), muscle aches, weakness, fatigue, hyperactivity, irritability, high blood sugar, excessive urination, excessive thirst, delirium, tremor, pretibial myxedema (in Graves' disease), emotional lability, and sweating.