The symptoms as mentioned in your post suggest that your friend might be having a Liver disease..most commonly Cirrhosis
It can be due to:
1. Alcohol induced liver disease
2. Infections like Hepatitis
3. Hepato toxic drugs
Presence of yellowish tinge to skin and whites of eyes is called jaundice
and is indicative of increased bilirubin
levels in the blood.
Swelling of stomach, known as ascites is due to accumulation of fluid.
Investigations like Liver function tests, Ultrasound
scan of abdomen will be helpful in clinching the diagnosis.
So, it will be better to consult a Gastroenterologist
& get a proper physical examination done.
So that appropriate management steps could be taken.
Wishing him a Good Health. Let me know if I need to clarify further.
Thanks & take care.