my 11 years old daughter had fungal infection of external ear about 45 days back for which she under treatment in form of oral and ear drops. She recovered in ten days. She did not have any fever and also her tympanic membrane was normal on examination. She then also had tenderness of mastoid on deep pressure more than contralateral side on comparison. Ten about 25 days later she has a very peculiar pain i her same ear. This pain starts around midnight, while she is still awake or even if she is sleeping, and it lasts till about 2am in night. Pain appears i bouts and lasts for about one or two seconds but is very severe and is associated with a grating sensation or sound in earn. This sensation lasts throughout till 2am and only increases during sharp painful spurt. She is afebrile and normal as and active throughout the day. Presently she has some tenderness on her Mastoid of same side as well as in preauricular region. Her ext ear and the tympanic membrane is normal on appearance and there is no discharge from the earn. Kindly suggest any investigation required or any treatment.