Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. Heavy drinker, smoker, hepatitis B positive and heavy weight gain. All this points the favour of liver failure in your brother. Because of liver failure protein is excreting in extracellular fluids causing the body to accumulate more of water. The only care with your brother is required a urgent hospitalisation. Your problem won t solve without hospitalisation. I suggest you to make your brother free from alcohol and smoking. If he won t withdraw than this problem is going to be increase than of decrease. Right now I think the pain is because of the fluids accumulated in the abdomen you can say it as a ascites. Drainging the fluid right now can cure you. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM