Can shriveled fingertips and toes be caused by an autoimmune disease? ?
I have RA ,Sjogrens and Raynauds Disease which is a precursor to sclerderma. The skin on my cuticles is hard and tough and fingers and toes are puckered and shriveled.
The hardening symptom you are encountering can be related to those autoimmune diseases you mentioned. This may due to the excessive deposits of collagen in the skin. However, the condition also causes tightness of the skin, I'm thinking that the shriveled appearance may be secondary to the ulcerations associated with Raynaud's disease (if ever you do have skin ulcerations).
There's no hard and fast treatment with those disease, only management of symptoms. Once the causative factor is addressed and management is maintained, then you'd also maintain the physical improvements as well.