Yes, what you have mentioned on autonomic neuropathy secondary to Sjogren's syndrome may help explain your condition.
Sjogren's Syndrome is associated with several forms of neuropathies. One form is a multiple cranial neuropathy.Trigeminal neuropathy has also been considered.The trigeminal nerve supplies portions of the scalp.
You may want to look into this and discuss your concerns with your physician for further evaluation and assessment.