Hello,
Thank you for your query at DoctorSpring.com
I understand your concern.
I think your concerns are definitely valid. The G-button looks suspicious. However, it is very difficult to confirm the suspicion on a photograph. A direct clinical examination alone can rule out an infection. We advise our parents to look out for signs such as 'redness, swelling, or warmth at the tube site; discharge that's yellow, green, or foul-smelling; and/ or fever'. There appears to be some redness around the site. But, we cannot really look for anything else through e-communication.
You can touch the area after cleaning your hands and donning sterile gloves. See if she has any pain around that site. You may also slightly lift up the G-button to look for any discharge from around it. If these are present or if your child is running fever, then it would be a definite sign of an infected G-button and you can approach your medical team. Also watch out for:

• excessive bleeding or drainage from the tube site
• severe abdominal pain
• Vomiting or diarrhea
• trouble passing gas or having a bowel movement
• pink-red tissue (called granulation tissue) coming out from around the g-button.