Clear drainage after a head injury may be a spinal fluid leak
A skull base surgeon explains clear drainage and when to get checked fast
Your brain and spinal cord sit in a liquid called cerebrospinal fluid. A head injury can tear the lining that holds this fluid in. A leak may show up as clear fluid coming from the nose or ear. Everyday nasal drainage can look much the same. So you can’t tell the cause just by looking. [1, 2]
A possible leak needs a prompt exam. It can be tied to an injury at the base of the skull and a risk of infection. [1, 2]
Give your doctor the details
Tell your doctor which side the fluid comes from and when it started. Say whether it keeps dripping and whether you’ve had a skull fracture or surgery. Mention any headache, hearing or vision changes, fever or stiff neck. [1, 2]
Your care team may test a sample of the fluid. Imaging can help them find the leak. Do not push a swab deep into your nose or ear to collect fluid. If the team gives you directions for collecting it, follow them. [1, 2]
What to avoid while it's being checked
If doctors suspect a leak, ask what to avoid until a specialist makes a plan. Things that raise pressure may matter, such as straining or blowing your nose hard. Don’t take a few dry hours as a sign the problem is fixed. [1]
Some leaks need a procedure to seal the opening. Others are handled in different ways. Where the leak is and what caused it guide the treatment. [1]
Signs that call for emergency care
Get emergency care for clear fluid from the nose or ear after a head injury. Go right away, especially if you also have a worsening headache, fever, stiff neck, confusion or vomiting. New brain or nerve symptoms are another reason to go. Tell the emergency team about the crash and any skull fracture you know of. If these symptoms start, don’t wait for a regular appointment. [2, 3]
Questions to raise
- Could this drainage be cerebrospinal fluid?
- What test or scan do I need, and who will read the results?
- What should I avoid until the leak is checked?
Track when the drainage started
Sources and further reading
- 1Johns Hopkins Medicine cerebrospinal fluid leak
- 2NHS head injury and concussion
- 3Leeds Teaching Hospitals following a head injury
Read this as general education from a skull base surgery perspective. Clear drainage can have several causes. After a head injury, get checked quickly instead of trying to figure it out on your own.
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