By definition, a picky eater is over two years of age, selects and chooses to eat certain foods and refuses other food items. Among younger children, the same phenomenon is called food phobia or food refusal.
With children, taste buds are evolving and it is quite possible that some foods might not appeal to their tastes at a certain age. As they grow older, they might dislike foods that they once liked and enjoy foods that they once disliked. Children also have a more sensitive sense of taste than adults, making them choosy about foods.
Certain dietary habits or patterns might also be responsible for your children being finicky about what they eat. If children are regularly served food that is too sweet, they may feel full and might skip the next meal. Or they may develop a fondness for sweets and might not like other food. This could deprive them of the nutrition they need. If the food is very oily too, children will feel full for longer and might refuse to eat. The structure and the texture of food will also matter.
Some anxious parents worried about allergies or obesity or other such problems might impose food restrictions. With milk and dairy products taken out of their diets, children suffer calcium and protein deficiencies and could develop food phobias.
Children might also have medical problems that make them fussy about food. Abdominal pain, gastritis, ulcer, constipation, trouble swallowing, esophagitis, and other such problems may be responsible for why children refuse food. Any throat trouble or even esophagitis (an inflammation of the oesophagus) could make it painful for a child to swallow even semi solid food and they might not be able to explain this, choosing instead to refuse food. In case of teeth eruption (when new teeth are developing) or in case of meningitis, children tend to refuse to eat or they might throw up after eating.
It helps to check children’s stools. Hard stools might mean that your child needs more water. In addition, check if your child’s tummy seems bloated. This could indicate stool blockage or other problems. If your child’s tummy is flat, then the eating problem might be emotional. Abdominal pain can also be a symptom of a medical problem. Unfortunately, children cannot explain the type of pain they feel, making it difficult to diagnose. It is also possible that abdominal pain is an excuse that has worked before and is employed to refuse food that children do not like. If children eat 2-3 spoonfuls and then complain of pain, it could be because they do not like the food, bowel full of stool or because the food triggers an allergic reaction. Therefore, behavioural and food patterns will have to be assessed or you could consult a doctor to rule out a medical problem. A food calendar also helps keep track of adverse reactions to certain foods.
In some cases, a neuro-developmental disorder like autism could also make children fussy about food. Nearly 80% of autistic children have food-related problems.
If it seriously affects food intake, then picky eating could lead to malnourishment and sickness.

