Yes, one should be concerned Because it is most likely a case of rota virus induced diarrohoea This is the commonest cause of diarrohoea in such age Main treatment is re-hydration with ORS (MARKET AVAILABLE ORAL REHYDRATION SOLUTION. Antibiotics will have limited role Give frequent light feeds, soft diets, avoid high protein, ripe banana could be helpful Consult pediatrician immediately without any delay: If the frequency and amount of stool increases, child look dehydrated, skin wrinkles, extremities become cold, looks dull and lethargy Giving ORS is the mainstay of treatment to prevent complications