Meningitis
Inflammation of the membranes covering the brain and spinal cord, most often from infection. Bacterial meningitis is a life-threatening emergency causing fever, severe headache, a stiff neck and sometimes a rash — it needs immediate hospital treatment. Viral meningitis is usually milder.
What it is
Meningitis is inflammation of the meninges — the protective membranes around the brain and spinal cord. It is most often caused by infection, and the type of infection matters enormously. Bacterial meningitis is a true medical emergency: it can worsen within hours and be fatal or cause permanent harm (deafness, brain injury, loss of limbs), so it demands immediate hospital treatment with antibiotics. Viral meningitis is far more common and usually much milder, often settling on its own. Less commonly, meningitis has other causes (fungal, or non-infectious). The classic warning signs are fever, a severe headache, a stiff neck (pain and difficulty bending the head forward), dislike of bright light, nausea and drowsiness or confusion; in the meningococcal type a distinctive rash of red-purple spots that do not fade when pressed can appear (a red-flag sign). Babies may instead be floppy, feverish, feed poorly or have a bulging soft spot. Diagnosis is urgent and hospital-based: blood tests and, crucially, a lumbar puncture to examine the spinal fluid identify the cause. Vaccines now prevent several of the most dangerous bacterial types.
Key lab markers
- Full blood count (WBC and neutrophils) — often raised in bacterial infection.
- CRP and procalcitonin — inflammatory markers, typically high in bacterial meningitis.
- Blood cultures — to identify the organism.
- Lumbar puncture (spinal fluid) — the key test; cell count, protein, glucose and cultures distinguish bacterial from viral.
- Clotting tests — if a rash or severe illness suggests spreading infection.
- These support urgent hospital diagnosis; they never replace immediate treatment when meningitis is suspected.
Symptoms
- Fever
- Severe headache
- A stiff neck — pain and difficulty bending the head forward
- Dislike of bright light (photophobia)
- Nausea and vomiting
- Drowsiness, confusion, or being difficult to wake
- A rash of red-purple spots that do not fade when pressed (a red-flag, especially with fever)
- In babies: floppiness, poor feeding, high-pitched cry, or a bulging soft spot
Related symptoms
Related lab panels
When to discuss with a doctor
Meningitis, especially the bacterial type, is a medical emergency — do not wait. Seek emergency care immediately for the combination of fever with a severe headache, a stiff neck, dislike of light, drowsiness or confusion, and call for help urgently if there is a rash of spots that do not fade when a glass is pressed against them, or if a baby is floppy, feverish or feeding poorly. Bacterial meningitis can deteriorate within hours, and early antibiotics save lives and prevent lasting harm, so it is always safer to be seen urgently than to wait and see. If you have been in close contact with someone diagnosed with bacterial meningitis, seek advice, as preventive antibiotics may be offered. Vaccination prevents several dangerous types. Mediora.AI can direct you to this topic, but suspected meningitis needs emergency assessment in hospital right away — recognising the warning signs and acting fast is what matters.