Hypothermia symptoms vary depending on severity. Mild hypothermia (32–35°C) may cause shivering and confusion, while severe hypothermia (<28°C) can lead to unconsciousness and cardiac arrest. Frostbite begins with redness and pain in the affected area, progressing to grayish-yellow skin, numbness, and in severe cases, tissue death or gangrene. Early detection is key to preventing complications.