When the output of human growth hormone is lower than it should be, so many areas of both the physiological and psychological systems are affected resulting in improper blood pressure and cholesterol levels, lack of bone and muscle strength, a weakened immune system, added weight, cognitive abilities, and
psychogenic issues.
Not exact matches
If there is no evidence of a medical
issue, excessive grooming may be
psychogenic in nature.
Those cases need to be differentiated from stress induced over grooming (
psychogenic alopecia although wikipedia is confusing the two
issues).
In both cases, I works the same way, so I guess the whole
issue relates probably to some
psychogenic dysfunction.