Hi, my GP suspects Reynaud's but I am not convinced so would love to know if these symptoms are familiar to you. The tip of one finger (only one) can be agonising: in the cold it can feel like frostbite, but does not change colour; in the warm it can throb (it is now, but I'm indoors and comfortable); accidentally touching something, even paper, on the front below the nail sets off the excruciating frostbite feeling; the nail no longer grows properly on the left, there is a red patch on the left above the cuticle, and the nail splits as the right side grows. Does this suggest Raynaud's to you? It's the erratic throbbing I am having difficulty dealing with. Thank you.