Liver cancer
You normally won’t have any pain until your liver cancer has advanced to later stages. Once you do start to hurt, it can show up anywhere from your abdomen to your shoulder. Your doctor may be able to feel a lump by pressing on the right side of your belly. You may also lose weight, feel itchy, have yellow skin or eyes, have a swollen stomach, and feel sick.
Gallstones
Your gallbladder is tucked right underneath your liver. So, gallstones — digestive juices that harden into nuggets — can cause pain that you might mistake as coming from your liver. You may have sudden pain that gets worse quickly. Gallstone pain may be in the center or right side of your upper abdomen, between your shoulder blades, or in your right shoulder.