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| Stirnhoehleinfektion or Sinusitis for upper sinuses
Kieferhoehleinfektion for lower sinuses | |
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Stirnhöhle
ninfektion / Kieferhöhle
ninfektion (ö = oe if you have no Umlaut keys). Sinusitis, as in English, is just a generic term for an inflammation of any kind of sinus.
Besides frontal and maxillary sinuses, there are quite a few more paranasal sinuses, all of them prone to infections too. And there are more sinuses in the human anatomy that have nothing to do with the nose.