The secretion of T3 and T4 by the thyroid is controlled by an endocrine feedback system involving the pituitary gland and the hypothalamus in the brain. Since the thyroid gland is regulated by the pituitary gland and the hypothalamus, thyroid disorders may result not only from defects in the gland itself, but also from disruption of the control system. Thyroid disorders caused by overproduction of thyroid hormones are called hyperthyroidism, and underproduction of these hormones is known as hypothyroidism.
Hypothyroidism, or underactivity of the thyroid gland, may cause a variety of symptoms and may affect all body functions. The body's normal rate of functioning slows, causing mental and physical sluggishness. The causes may be due to disease of the thyroid gland (primary hypothyroidism) such as Hashimoto's disease where the body's immune system attacks the thyroid gland, or from failure of the pituitary gland to secrete a hormone to stimulate the thyroid gland (secondary hypothyroidism).
Early symptoms; weakness, fatigue, cold intolerance, constipation, weight gain (unintentional), depression, joint or muscle pain, thin, brittle fingernails, thinning of hair, pale color.Late symptoms: slow speech, dry flaky skin, thickening of the skin, puffy face, hands and feet, decreased taste and smell, thinning of eyebrows, hoarseness, menstrual periods, abnormal.
In homoeopathy medicine like Thyroidinum, Iod, Fucuc, Lapis alb, Calc carb are used for the treatment. The proper analysis of the case with the qualified homoeopathic physician will give the better results.