A nasal blockage can be frustrating, particularly if you can't clear it. A blocked nose related to a nasopharyngeal tumor will not get better if you blow your nose. Blocked noses can leave us feeling breathless because half our air passages are perpetually out of commission. Congestion can also make it difficult to sleep, but like tinnitus, if congestion is your only symptom, it's unlikely to be cancer. If you can't seem to shake the blockage, however, you should see an ENT specialist or speak to your physician.

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