Stomach pain on the left side, along with nausea, can happen for several reasons, even when routine blood reports are normal. In people with chronic constipation, pain may occur because of gas buildup, hard stools, bloating, or strain in the intestines, especially on the left lower side, where stool commonly collects. Sometimes constipation itself can worsen acid reflux symptoms and cause nausea or stomach discomfort. GERD, indigestion, gastritis, side effects of medicines, irregular eating habits, stress, or reduced bowel movement can also contribute to these symptoms. Although Nexpro helps reduce acid production, it may not completely prevent stomach discomfort if constipation, dietary factors, or other digestive issues are present. It is important to drink enough water, increase fibre intake through fruits, vegetables, and whole grains, stay physically active, and avoid skipping meals. Limiting oily, spicy, junk, or heavy foods may also help reduce both constipation and acidity symptoms. Since your pain has continued for 7 days, it would be wise to consult a doctor if the symptoms are persistent or worsening. Further evaluation, such as abdominal examination, stool-related assessment, ultrasound, or other digestive tests, may sometimes be needed even when basic blood tests are normal. Seek medical attention promptly if you develop severe pain, vomiting, fever, blood in stools, black stools, weight loss, severe bloating, or inability to pass stool or gas, because these symptoms may indicate a more serious condition. With proper treatment of constipation, diet changes, hydration, and medical evaluation if needed, many people experience significant improvement in these symptoms.