Sir, My son is 14 months old and is under weight, he born on 29 june'14 with the weight of 2.40 kilograms and within an years his weight is approx 8.50 kilograms. Today he got a fever due to fickle weather suddenly a concerned doctor expressed his apprehension towards his head size and asked to measure it in inches from amid fore head to rear portion before neck. We measured the head with tape and got s reading of 18 inches and 3 cm's. Concerned doctor did not gave us a reason behind whereas our family doctor is different and he never showed any anxiety towards above recited things. My son behave always normal infect he is a very charming boy Kindly suggest suitable advise.