Colds generally just need to run their course, try giving your child some vitamin C, which can help with cold symptoms, although the high doses required can cause diarrhoea so it’s best to stick to a multivitamin. Ensure that your child is eating healthily, getting enough rest and getting some gentle exercise. Also make sure that your child is having plenty of fluids, such as soup, water and juices. If she is having problems breathing at night, use a humidifier or some vapo-rub.
You should consult with your doctor if your child’s symptoms get any worse than the normal symptoms of the common cold, for instance if they are breathing rapidly, coughing so badly they are choking or vomiting, is sleepy all the time and doesn't want to play or eat, has thick coloured discharge for more than 10 days or a fever of over 100°F for a period of longer than three days.