Girls, hello. How do you treat children's throats when they get red?

Girls, hello. How do you treat children's throats when they get red? Surely you must know. Drink VERY abundant water, there is saline solution too. I read here about Lisabakt, asked the doctor, says 1/4 give can be tablets, but how to give them? On cheeks? What else would you recommend for a one-year-old child.