Hi JohnnyZenith

Welcome to NeuroTalk .

Sicca is a common clinical sign of Sjögren Syndrome, which is an autoimmune disease.

The other signs that you have described may be peripheral neuropathy, which can occur in Sjögren Syndrome.

The information in these two links may help you with this.

Sjogren Syndrome: Practice Essentials, Etiology, Epidemiology

Neurologic Complications : Johns Hopkins Sjogrens Center

All the best.