Hi welcome to health care magic.... Your worker suffering from ear problem, so I would like know about your occupation... High voice exposure avoided.... For your numbness in ear impacted wax can be the cause... Otological ear examination done to rule out ear problems like ear infection, ear drum swelling, wax etc..... According to cause further treatment guided... Ex. If wax is there than it can be removed with Ear Drops and syringing or suction like procedure... B12 level also should be checked if peripheral smear examination suggestive of macrocytic anemia. Take care Advise : For otoscopic examination consult otorhinolaryngologist and subsequent management...