Are you using any lotion on your hands? It could also be a body pH issue...or perspiration - any sweating increase on your hands recently? Your body might be putting out toxins through the skin on your hands that could be doing this, too. I don't know if metal toxicity would do this or not...interesting question.
Chronic Lyme Disease, Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, etc.; G-Tube; TPN via PICC (trying again to wean off the TPN).
Meds: IV Cipro, Heparin (to flush PICC line), Singulair, Claritin, Domperidone, Colloidal Silver, probiotics, digestive enzymes, Milk Thistle, Magnesium, homeopathy.