How to deal with frequent nail-biting

Patient's question:

Sure, I can help with that. Please provide the content you want to be translated.

Doctor's answer:

Hello, it may be caused by a lack of vitamins or trace elements. You can take multivitamin tablets or 21 Golden Vitamins, which are quite effective. At the same time, drinking more boiled water and eating more vegetables and fruits will help improve the symptoms.

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