An upset stomach with gas, evening discomfort, and a feeling of incomplete bowel movements for 10 days is most commonly due to indigestion or constipation, often triggered by irregular meals, low fibre intake, stress, or eating spicy and oily foods; sometimes a mild gut infection or Irritable Bowel Syndrome can also cause similar symptoms. To improve, eat simple home-cooked food, increase fibre (fruits, vegetables, whole grains), drink plenty of water, and maintain regular meal timings; avoid fried, spicy foods and excess tea or coffee. Light daily exercise, like walking, can help improve digestion and bowel movements. If the problem continues beyond 1-2 weeks, or if you notice severe pain, weight loss, or blood in stools, consult a doctor for proper evaluation and treatment.