Our expert says:
There are many potential causes for your symptoms, which may include infection. The fact that your dentist could not find any cause possibly rules out a dental infection, but a sinus infection may also be, amongst others, a possible cause.
In my opinion you should discuss this with your GP for a start.
In the meantime you can try some SPA-tablets (available from most pharmacies). They contain chlorophyll which may help.
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