Long-term insomnia may lead to sympathetic excitement in the body, and sympathetic excitement will cause a series of symptoms in the corresponding organs. After sympathetic excitation, the effect on the heart may be cardiac disturbance, so individual patients may have an increased risk of sudden death due to cardiac disturbance. The more common clinical symptoms of sympathetic excitation may include increased heart rate, accelerated breathing, increased heart contraction, increased blood pressure, increased blood sugar, peripheral vasoconstriction dysfunction, excessive sweating, large pupils, and vertigo.