Complications of impetigo are uncommon and are more likely to occur if you have bullous impetigo. If school sores spreads to other areas of the body, you could develop the following:
- Skin infection (cellulitis) - the impetigo spreads into the lower layers of the skin, causing pain, redness and swelling.
- Blood poisoning (septicaemia) - rarely, school sores spreads beyond the skin into the bloodstream and causes a serious infection that needs emergency medical treatment.
- Kidney infection (glomerulonephritis) - rarely, the immune response to the impetigo infection can cause kidney problems.
- Scarlet fever - school sores may cause a sore throat, fever and reddened skin.
- Psoriasis - impetigo can cause dry scaly patches on the skin
You are more likely to develop impetigo if you have: poor personal hygiene, diabetes mellitus or a weakened immune system, for example if you have HIV/AIDS.
Other complications include: scarring and lightening (hypopigmentation) or darkening (hyperpigmentation) of the skin
Signs and symptoms of PSGN - Poststreptococcal glomerulonephritis - commonly appear about two weeks after an infection. They include facial swelling — especially around the eyes — decreased urination, blood in the urine, high blood pressure, and stiff or painful joints. Most often, PSGN affects children between the ages of 6 and 10 years. Adults who develop PSGN tend to have more serious symptoms than children do and are less likely to make a full recovery.