Loose motions in children are most often caused by a mild stomach infection rather than cold weather or teething, although teething may sometimes make stools slightly loose without causing true diarrhoea; you can suspect infection if there are frequent watery stools, fever, vomiting, or poor feeding. The key to safe management is preventing dehydration by giving plenty of fluids such as ORS, breast milk, or regular feeds, and continuing a normal diet (like rice, banana, curd) while avoiding sugary drinks and self-started antibiotics. Monitor the child closely for warning signs like very little urine, dry mouth, sunken eyes, unusual sleepiness, or blood in stools, which need urgent medical care. Most cases of diarrhoea improve within 2-3 days with proper hydration and care, but if symptoms persist, worsen, or the child is very young, it is best to consult a doctor promptly.