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It was probably a virus infection in the beginning.
Recurrent symptoms after improvement suggests secondary bacterial infection has followed. This is a common occurrence. At this stage, you will need antibiotics. Because of the inflammation from virus, the area is prone for infection.
Occasionally, it could precipitate asthma
It is better to be examined by your GP and get confirmed.
If it lasts ten days or more, you will need investigation.
Wishing speedy recovery