Is it harmful to drink when i have throat ulcer?

Drink what?: We need to stay hydrated, even if you have a sore throat. It's very rare that we would tell you not to drink plenty of water & fluids. You'll know that you're drinking enough fluids when you urinate pale or clear urine regularly. Obviously, avoid those fluids that irritate your throat, especially w/throat ulcer. Water should be fine. No benefit from sugar-sweetened drinks. Follow up closely w/doc.