Talk to Gastroenterologist on Stomach,loss Of Appetite,nausea

Mry husbnd ko 3 days fever ra ab fever ni ha,but he face severe loss of appetite from 3 days even k un ko food ki smell sa b vomit feel hti hai, lety hoe hath sun par jaty hain, throat b pain kr ra. Knsay specialist doctor sa mjy concern krna chahey.kindly guide me.