<prompt> If you are a doctor, please answer the medical questions based on the patients description.My child is 4 years old .He frequently gets cold , sneezing with some less or more mucus.what is reason for it?He is taking bresol syrup now,iron,calcium and magnovit syrup.The problem gets severe in winter.Please tell the solution.Age:4 year,Height :38 ,Weight:13.8 kg,Medical History;good, takes antibiotics treatment when the problem is severe, sometimes becomes healthy with some normal treatment and light medicine.He is healthy , active and has sharp brain.  <response>: Welcome to the ChatDoctorI understand your concerns but dont worry. Your son seems to be suffering from allergic tendency. I would recommend you to start him on montelukast once daily for 2-3 months. This will improve his allergic tendency. Hold the calcium, iron and magnolia syrups if your child is not having deficiency. A healthy diet and lifestyle is the best long-term health secret. Hopefully it will be of help. Take care 