my 15 months old boy is 8 kg and has stopped gaining weight for past 5 to 6 months, other milestones and activities are normal but I am worried. kindly guide me on this

A. The gain of the weight normally becomes stagnant when the child is either having a nutritional deficiency or not eating well so you need to check for that and if required kindly have an assessment with your paediatrician so that you can start with necessary health supplements