Recently my hands & feet itch when cold. I initially thought it was due to starting vitamin d3 as it started when I started taking the vitamin. I first took a solid pill & thought it may have been due to the binding ingredients & the itching stopped. I then switched to an oil filled cap & the itching started again and I began to itch elsewhere (scalp, arms & legs). There was never any skin rash or erythema. I have now been off the vitamin for 2 weeks, but my feet & hands still itch but only if cold (itching stops when they warm). What could cause these symptoms since if it was a reaction to the D3 I would expect it to have resolved by now?