Hello girls! My daughter started crying. When she wakes up, she starts…

Hello girls! My daughter started crying. When she wakes up, she starts coughing. There's no fever. But the doctor prescribes Span and Viferon. ? She also has two lower teeth that are hurting. And today her sister says it's better not to give anything because she's got toothache now and from the drool she starts crying and even the heating is on as if it affects the tooth. Who has faced something like this? If the daughter cries and breathes through her mouth? What should I do?