Infection can develop after an injury or wound to the skin, a bite or
sting, a tattoo or piercing, or other skin problems. Signs of infection may
Increased pain, swelling, redness, or warmth
around the affected area.
Red streaks extending from the affected
Drainage of pus from the area.
nodes in the armpit or neck.
It is normal to have some pain and swelling following an injury. Pain
and swelling that occur with redness, red streaking, tenderness, heat, fever,
or puslike drainage may be caused by an infection. An infection most often
develops when germs (bacteria) enter the cut, punctured, or scraped skin after
an injury. What starts as a minor wound infection (such as an infection around
a nail bed) can lead to a serious infection, such as:
To diagnose encephalitis, your doctor will consider your symptoms and ask about any recent illnesses and possible exposure to viruses -- being near others who are ill or near mosquitoes or ticks, for example.
Your doctor may also order a magnetic resonance imaging (MRI) scan, spinal tap, or an electroencephalogram (EEG).
Blood tests to check for the presence of bacteria or viruses and immune cells produced in response to them can also be helpful.
Rarely, an analysis of a brain tissue sample...