My 1 week old has been crying a lot and has diarrhea I think. A friend who came to visit today suggested it might be umbical hernia. What should I be looking for to check if this is the case?

Do you notice there is a bulge at the umbilical area as shown in the picture? An umbilical hernia creates a soft swelling or bulge near the navel (umbilicus). If your baby has an umbilical hernia, you may notice the bulge only when he or she cries, coughs or strains. The bulge may disappear when your baby is calm or lies on his or her back. Umbilical hernias in children are usually painless. Umbilical hernias that appear during adulthood may cause abdominal discomfort. If you suspect that your baby has an umbilical hernia, talk with your child's pediatrician. Seek emergency care if your baby has an umbilical hernia and: -Your baby appears to be in pain -Your baby begins to vomit -The bulge becomes tender, swollen or discolored http://www.mayoclinic.org/diseases-conditions/umbilical-hernia/basics/symptoms/con-20025630