### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
hi , my son is 15 month old, from 3 to 4 days he passes air very frequently, his stool is very tight in form of small black stones and he also don;t take interest in taking any food item. otheriwse he is normal in his daily activity., but his stool his black/greenish in colours and very hard. i am very confused is it because of banana which i usually give him.

### output:

Welcome to the ChatDoctorIn my opinion your child is suffering from constipation.  Any child with stools that are large, hard, Chat Doctor. Constipation in toddlers isn't usually a sign of any serious disease. Most often It's caused by a problem that's easy to solve, like diet or ignoring the urge to go. When toddler constipation is a problem, you can try one of these remedies:Diet. To soften the stools and make them easier to pass, increase the amount of fluid and fiber your child gets each day. High-fiber foods include fruits and fruit juices that contain sorbitol (prune, mango, pear), vegetables (broccoli, peas), beans, and whole-grain breads and cereals. Limit foods that can increase constipation, such as fatty foods, banana that are low in fiber. Exercise. Make sure your toddler gets out to play for at least 30 to 60 minutes a day. Moving the body keeps the bowels moving, too. Improve bowel habits. Encourage your child to use the bathroom at regular times during the day, especially after meals and whenever he or she feels the urge to go. Let your toddler sit for at least 10 minutes at a time. Put a small stool under your children feet -- the leverage will help him push. Reward your toddler for using the toilet with a special story or a sticker, so it becomes a positive experience. Medicine: you can also give spy. Lactulose to treat constipation.