If he is premature, he may be given vitamins and other nutrients to help him grow stronger and if he has an infection, antibiotics to help clear it up.
Sometimes fluids may be restricted and caffeine given, which is a diuretic, because too much fluid can make the condition worse.
With the right treatment, most babies can recover with no lasting problems.
Joanna is a freelance health writer for The Mother magazine and Suite 101 with a column on infertility, http://infertility.suite101.com/
She is author of the book, "Breast Milk: A Natural Immunisation" and co-author of an educational resource on disabled parenting, in addition to running a charity for people damaged by vaccines or medical mistakes.