Any wound, insect bite, burn, rash, blister, graze, bruise or other lesion may become infected. Sometimes, a swelling due to a sprain may become infected, especially if the overlying skin is broken. Always check for signs of infection which usually appears about two days later.
Signs of infection include:
- redness, warmth, swelling, increasing pain and tenderness
- formation of pus (yellow, green or cloudy) which may lead to an abscess
- red streaking around the wound which seems to spread slowly in the direction of the heart
- swollen lymph nodes in the groin or armpit of the affected limb, or in the neck
- fever (only if the infection is more advanced)
See a doctor if these signs appear. You may require an antibiotic and/or drainage of the infection.