A hernia is a weakness in a tissue layer of your abdominal wall called the fascia. Normal contents within your abdomen, such as bowel or fat, can protrude through this weakness and appear as a bump on your abdomen. An umbilical hernia is located in or very close to your belly button. You should talk to your doctor
to see if you may have a hernia.
Hernias can appear as a soft, painless bump that you may notice more when bending forward or straining. If abdominal content such as fat or bowel protrude into the hernia and get caught, you may experience pain and notice a change in the hernia from soft to firm. This is concerning for an incarcerated hernia, a hernia that has trapped and reduced blood supply to the abdominal contents protruding into it. You may also experience nausea and/or vomiting associated with this condition. This should be evaluated urgently by a physician.
However, a lump can be many different things. You may have a skin abscess, a collection of pus that can form underneath your skin. Alternatively, you may have a pilar cyst (a cyst that forms around a hair follicle).
It is not possible to receive a diagnosis without being evaluated by a doctor; thus, I strongly advise that you consult with your primary care physician
to talk about your lump and whether you may have a hernia that may require evaluation by a general surgeon