Hello, may I ask a question? My left arm (forearm to elbow) part of skin started to feel very cold as if I am right next to air conditioner. It lasted until today so I tried to make it warm by using warm cloth. Then suddenly I could see red stain looking lines all over my arm. (It does not hurt, it wasnt swollen or anything) Few hours later, red lines disappeared but my skin became cold again... I have no idea what this is..