Increasing redness around the wound
Warmth around the wound
Swelling
Pain that is getting worse
Pus or cloudy drainage
Bad smell from the wound
Skin around the wound becoming hard or tender
Red streaks spreading from the wound
Fever or chills
Wound not healing or getting larger
Swollen lymph nodes near the wound
Feeling generally unwell
Darkening or discoloration of the wound or surrounding skin