On rewarming the pain does much more than tingle, and swelling and redness occur. Severe cases crack the skin and bacterial invasion is imminent. Avoid aggressive rewarming. All cases need to be kept warm and dry. Walking may become difficult.
Painkillers often help.
It can occur in as little as one hour. Usually six to twelve hours pass before the eye feels painful and dry and gritty. Rinse the eye with cold water, and patch it closed. If it doesn't, or if the pain is unbearable, see a physician. The winter sun is closer to the earth than the summer sun, but, because it's lower in the sky, the radiation is less intense.