Lower carnial nerve palsy. Plz.

My father have difficulty in swallowing Food, little tongue on left side, drooling slaiva since 1 month, firstly I went to ent, doctor did endoscopy and CT of neck, doctor said everything is alright,and give medicines but no improvement after that I go to neurologist he said lower carnial nerve palsy problem and advice me to MRI,I attached both MRI and CT scan, plzzzz tell me the chances of recovery and treatment s , plzzzz I'm so worried.. doctor gave me medicine for 5 days and said if there is no improvement with these medicines than you have to admit your father..my father don't want to admitted..what I do is there any other solutions or what plzzzz tell me the full procedures and treatment plzzzz.. it's my humble request 🙏🙏