Complications of cellulitis include blood poisoning, abscesses, necrotising fasciitis and meningitis, according to the National Health Service. The most common causes of the skin infection are staphylococcus and streptococcus bacteria.
Symptoms of blood poisoning include fever, rapid heartbeat or breathing, dizziness, reduced urine flow and pale or cold, clammy skin.
Abscesses appear as swollen, pus-filled lumps under the skin caused by a build up of bacteria and dead white blood cells.
Necrotising fasciitis is a rare but serious bacterial infection with symptoms that include severe pain, fever, diarrhoea, vomiting and unconsciousness.
While it varies among adults, common symptoms of meningitis include sudden high fever, persistent headache, neck stiffness, nausea or vomiting, joint pain, drowsiness and confusion.