• Difficulty breathing, swelling of your lips, tongue or throat, or feeling faint
• The red area is spreading quickly, or has red streaks spreading from it
• Fever, chills or feeling very unwell
• Severe pain, or pain getting worse quickly
• Blisters, or skin that looks dark or purple or feels numb
• New confusion or drowsiness, fast breathing, or mottled, blue or very pale skin