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Dear you are suffering with suppurative otitis Media
asymtomatically for a long time. It was only noticed only when it became symtopmatic (shooting pain).
SOM usually follows after a viral infection if the immunity of the person is not very strong.
It can be treated with full course of relevant antibiotics (according to the culture/sensitivity report of pus). antinflammatory and analgesics drugs. If the pus is accumulated there ,it can be drained also.
Some PPI ( Anti acid Medicine) along with some Anta Acid gel is also required to heal your gastritis
When your infection is completely eradicated only the you will start feeling fresh and energetic
Hope your query is answered with your satisfaction.