Suggest Treatment And Precautions To Be Taken For Acute Sciatica

hi,my dad is 71,hes suffering from acute sciatica for the past 2-3months.he stays in siliguri.he cant walk also now things are worsening.therapies were given to him.we want to get his treatment done in mumbai.which is the best place for it?also what precautions one should take and are there any restrictions on food?