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Recurrent sore throat
and common cold
is sugestive of some allergic episodes.
Try to find out the allergy
.Avoid cold drinks,chilled drinking water,oily foods,do regular warm water gargle,wear hand ki. on face during two whl driving.
Blood invesigation is must to rule out allergy.(eosiophil count).Urine investigation has relation regarding sore throat.
Consult ENT for better guidance and medical management.