Observations on Auras: Hand Numbness

One of the aura effects that I have been getting for several decades has been a progressing numbness that slowly passes diagonally across the palm of one hand in a wave. The absence of touch and pain sensation is complete. I can poke the affected area with a sharp object and feel absolutely nothing. I recently observed by chance that the ability to sense temperature is completely unaffected in the area that has gone numb. The temperature sensitivity remains so acute that I can sense the warmth of my breath with my numb fingertips. Has anyone else noticed this? If there is anyone else out there who gets numbness auras, please try checking your sensitivity to heat and cold.