I had my Gallbladder removed 5 months ago. Everything was ok till last week. Suddenly I started feeling bitter taste in mouth, severe nausea in morning, vomiting sensation, from last two or three days sores in mouth. I can t eat properly due to nauseated feeling. Always feel light headed, even I have lost 2kgs of weight. Since last month I started having hot water and green tea on empty stomach in the morning, problems started after this. Can this be because of gallbladder surgery or diet problem? I feel depressed most of the times.