2.5-year-old baby suddenly loves to suck fingers - is there an insect?

Patient's question:

No

Doctor's answer:

Hello, this symptom is considered to be caused by a lack of calcium and zinc or high lead levels, and active examination and treatment are needed for better results. You can supplement with multiple vitamins while paying attention to lead excretion, maintaining a light diet, eating more fruits and vegetables, and balancing coarse and fine grains, which are beneficial for regulating this condition.