Yes, your body may shake (called tremors) if you have a thyroid problem.
actually 98.6 is the normal temperature of the body... 97.8 is in the normal body temperature range
Thyroxine, a hormone produced by the thyroid gland, is responsible for increasing metabolism and body temperature regulation.
Thyroid-stimulating hormone (TSH) regulates thyroid function by stimulating the thyroid gland to produce thyroid hormones such as thyroxine (T4) and triiodothyronine (T3). High levels of TSH can indicate an underactive thyroid, while low levels can indicate an overactive thyroid.
When your body temperature drops, it doesn't necessarily mean it's because of your thyroid. For example, one of the symptoms of those who have hyperthyroidism (an overactive thyroid where the thyroid gland produces too much thyroid hormones) they can experience an intolerance to warm temperatures and increased perspiration.
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High temperatures are usually caused by some sort of infection, be it viral or bacterial. A high temperature indicates the body is warming in an attempt to thwart the disease. Low temperatures, on the other hand, that are not related to exposure to severe cold are usually related to hormone levels, specifically thyroid hormone levels. A body temperature below 98.2 upon rising can indicate a hypothyroid, or low thyroid hormone state.
Body temperature is controlled by the Pituitary gland. It's a small, almond sized structure at the base of the brain that controls body temperature, blood pressure and controls the function of many other glands such as thyroid. It could just be that your Pituitary has a lower set point and that's just your normal temperature. It might be something to investigate next time you go to your doctor. Also, get a blood glucose meter and check your blood sugar level before and after eating a high carb snack. If it drops dramatically afterwards, you may very well be hypoglycemic... Low body temp and normal thyroid test may also indicate Wilson's Temperature Syndrome, where the body is making enough Thyroid hormone, but the cells are not converting it properly.
Thyroid hormones help regulate body temperature in addition to the hypothalamus of the brain.
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Probably not in itself, but it could indicate some problems in your thyroid gland or elsewhere. Why not get it checked out by a physician. No this is not a dangerous internal temperature. The normal is 98.6 F. This is within the normal ranges for body temperature. Problems with Thyriod glands tend to cause your temperature to decrease. Abnormal temperature is defined as being under 95F or over 99F.
Higher temperature.