First of all, a child must always stay with her parents and communicate with each other what she needs to help her solve her health problems. Health is not a problem that can be cured in a day or two. Illness is an injury caused by long-term habits. So you have to ask her, is it useful to keep fit? If you want to go to the hospital, you can always stay with her. Let her have no worries.
In addition, let her develop good living habits, the most important diet, eat lunch in the morning, eat less at night, drink more water and increase vitamin supplements. Tell her to be in a good mood, exercise every day and sleep well at night. Only in this way can she be healthy. It is better to adjust the diet and adopt nutritional therapy, and those who don't understand don't participate. If you care about her enough, talk to her about knowledge, be a wise person and help her solve her psychological problems and health problems, those people will not cheat her.
As a child, how can you not know what your mother thinks? People don't understand the importance of health until they get sick. They will go through an unhealthy period and seek treatment. They hope to improve as soon as possible. Don't say that old people are afraid of death, and young people are more afraid of death. Both sides hope to be cured as soon as possible. So it's easy to be deceived by the employees of those beauty salons. You can find some life cases online, let her see and know the harm of these behaviors, and I believe she will change slowly.