I'm sorry to hear you're experiencing severe pain and skin discoloration near your belly button. These symptoms could indicate a serious condition such as an infection, internal bleeding, or compromised blood flow to the area, which requires urgent medical evaluation.

What you should do:

• Seek immediate medical attention by visiting the nearest emergency room or contacting emergency services.
• Avoid eating or drinking until evaluated by a doctor.
• Do not apply any medication or home remedies to the affected area without professional advice.

Severe abdominal pain combined with blue discoloration of the skin is not typical for simple gas and may signal a medical emergency. Please contact a specialist doctor, such as a general surgeon or an emergency medicine physician, as soon as possible for prompt assessment and treatment.To narrow down potential causes, we will need some more information.Please provide your age and gender.