Hyperthyroidism is a condition in which an overactive thyroid gland is producing an excessive amount of thyroid hormones that circulate in the blood. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3) The hormone with the most biological activity is T3. Once released from the thyroid gland into the blood, a large amount of T4 is converted to T3 – the more active hormone that affects the metabolism of cells. . 
Causes—
- Abnormal Secretion Of TSH (pituitary tumor, trophoblastic tumor)
- Amiodarone (Anti-Arrhythmic Medicine)
- Excessive Intake Of Thyroid Hormones
- Graves Disease
- Thyroiditis(viral, lymphocytic)
- Toxic Nodular Goiter
- Smoking
- Stressful Life
Symptoms And Signs-
- Apathy
- Confusion(In Elders)
- Dementia
- Depression
- Difficulty in Breathing
- Disturbed Sleep
- Double Vision
- Excessive Sweating
- Fatigue
- Frequent Urination
- Hyperactivity
- Increased Appetite
- Infertility
- Loss Of Interest In Sex
- Mood Swings, Irritability and Nervousness
- Muscle Weakness
- Oligomenorrhoea/Amenorrhoea
- Ophthalmoplegia
- Palpitations
- Pruritis
- Pass Stools Frequently
- Pretibial Myxedema
- Protruding Eyes (Exophthalmos)
- Sensitivity To Heat
- Steatorrhoea
- Sudden Weight Loss or Gain
- Tremors
- Thinning of hairs
- Thyroid acropachy
Investigations—
- Blood tests-levels of TSH, T3, and free T4
- Radioactive iodine uptake
- Orbit CT scan
- ultrasound
- Thyroid stimulating immunoglobulin (TSI)
- Thyroid peroxidase (TPO) antibody
- Anti-TSH receptor antibody
Treatment—
Ayurvedic Medicines
- Tab Tinifat
- Cap Safojas
- Cap Kushagra
- Tab kanchnar guggulu
- Chanderprabha vati
Surgery