Hello everyone, I have a question for you. My daughter has developed a…

Hello everyone, I have a question for you. My daughter has developed a red stripe on her lower lip. It's not exactly red, but noticeable. The stripe has dots. What could this be? Lately, she's been sleeping poorly because her teeth hurt, and my husband and I have been coughing, sore throat, runny nose. Could this be the cause? Please tell me what it might be.