From MEpedia, a crowd-sourced encyclopedia of ME and CFS science and history

Sinusitis is an inflammation of the sinuses, which may be caused by an infection. Sinusitis symptoms may include pain from blocked sinuses, a cough, fever, weakness, fatigue, and congestion.

Chronic sinusitis is sinusitis that lasts over 12 weeks, and may even last for years. Possible causes include allergies, nasal problems and certain illnesses. Acute sinusitis, which lasts under four weeks, often begins as a cold but then turns into a bacterial infection.

Treatments for sinusitis include antibiotics, decongestants to unblock sinuses, and pain relief

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Chronic sinusitis is known to occur in some people with ME/CFS.

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