Hi there, thanks for asking. The symptoms you mentioned (low pulse rate, numbness
in the fingers, low body temperature, etc) are described as constitutional instability especially if no other medical problem has been identified in the investigations. This could be related to a chronic sleep problem or chronic fatigue syndrome
. It could be also related to chronic exposure to some stressors at work or at home while somebody feels does not know exactly how to deal with them. You should talk with your doctor to find which of the mentioned items could be responsible for your situation. I wish you the best health.