Low thyroid levels and hormonal fluctuations are caused by thyroid inflammation and menopause, as listed by WebMD. These conditions are accompanied with mood swings, fatigue, insomnia, increased heart rate and changes in libido.
A low thyroid level is more technically referred to as hypothyroidism, as noted by WebMD. The thyroid gland is responsible for regulating metabolism. Inflammation of this gland causes a feeling of sluggishness since the metabolism is not functioning properly to convert food to energy. The thyroid gland can become inflamed after exposure to radiation or after consuming certain medications, as listed by WebMD. A medical expert may prescribe a synthetic thyroid pill to compensate for the deficiency.
Hormonal fluctuations are linked to menopause, as noted by Menopause.org. The relevant hormones are estrogen, progesterone and testosterone. During early stages of menopause, estrogen levels fluctuate and can cause night sweats, hot flashes, insomnia, fatigue and bloating. Fluctuations of progesterone impact menstrual cycles. Testosterone fluctuations do not have any known effects in women. If uncertain about menopause, a woman can undergo a blood test to determine if hormone levels are sufficient, as noted by WebMD. In addition, women should monitor menstrual patterns and note any irregularities. A woman is at risk of developing additional health problems, such as osteoporosis and heart disease, after menopause. Treatments are available to reduce the risk of contracting these conditions.