Generally speaking, these symptoms are unusual with simple small umbilical hernias. However, sometimes bowel can enter these hernias and partial blockage to the bowel can occur causing the very symptoms you describe of nausea , diarrhea and vomiting. Speak with your GP about your symptoms.
Thanks for posting your questions and photograph. You have a narrowing of your belly button most likely due to scar tissue. An umbilicoplasty may improve the aesthetic appearance of your belly button. Arrange a consultation with a fully qualified and experienced plastic surgeon to disc...
Your problem is what umbilicoplasty procedures are designed for. They're different for every patient, but it usually involves removing the extra skin and/or scar, and hiding the incision as much as possible. Because you have a piercing above the navel, there would also be a small vertical scar...