1. A)LOCAL CAUSES B)REFERRED CAUSES C)PSYCHOGENIC

2. A)LOCAL CAUSES EXTERNAL EAR FURUNCLE, IMPACETD WAX,OTITIS EXTERNA,OTOMYCOSIS, MYRINGITIS BULLOSA, HERPES ZOSTER, AND MALIGNANT NEOPLASMS. MIDDLE EAR ACUTE OTITIS EXTERNA, EUSTACHIAN TUBE OBSTRUCTION,MASTOIDITIS, EXTRADURAL ABSCESS, AERO-OTITIS MEDIA AND CA MIDDLE EAR

3. B)REFERRED CAUSES  AN EAR RECEIVES NERVE SUPPLY FROM  VTH(AURICULOTEMPORAL BR.)  IXTH (TYMPANIC BR)  XTH (AURICULAR BR) CRANIAL NERVES  C2 AND C3 (GREATER AURICULAR)  PAIN MAY BE REFERRED FROM THESE REMOTE AREAS.

4.  VTH(AURICULOTEMPORAL BR.)- DENTAL ORAL CAVITY TEMPOROMANDIBULAR JOINT DISORDERS SPHENOPALATINE NEURALGIA

5.  IXTH (TYMPANIC BR)  OROPHARYNX  BASE OF TONGUE  ELONGATED STYLOID PROCESS

6. XTH (AURICULAR BR) CRANIAL NERVES MALIGNANCY OR ULCERATIVE LESION OF- VALLECULA EPIGLOTTIS LARYNX LARYNGOPHARYNX OESOPHAGUS

7. C2 AND C3 SPINAL NERVES CERVICAL SPONDYLOSIS INJURIES OF CERVICAL SPINE CARIES SPINE

8. C. PSYCHOGENIC WHEN NO CAUSE HAS BEEN DISCOVERED, PAIN MAY BE FUNCTIONAL IN ORIGIN BUT THE PATIENT SHOULD BE KEPT UNDER OBSERVATION WITH PERIODIC RE-EVALUATION