Question
Why do children frequently bite their fingers, leading to the appearance of calluses on their hands? Is this a habit issue or a symptom of a lack of certain elements in the body?
Answer
Based on the patient’s description of symptoms, this may be caused by dermatitis from onychophagia. It is recommended to use mometasone furoate cream or desonide cream for topical treatment in the affected area, and to correct poor habits. In this case, it may not be related to a deficiency in nutrients; the primary cause is likely psychological factors, possibly resembling symptoms of an obsession. Psychological therapy can be considered as an intervention.