Experts Featured in This Article:Jennifer Wider, MD, is a women's health expert, author, and radio host. Digestive issues: A more serious issue that can cause bloating involves the gut. If you still experience bloating, Dr. Wider also suggests consuming ginger, as studies have shown it can reduce gastrointestinal pain and bloating. Unprotected sex: Having unprotected sex with someone who has a penis can also cause cramps and stomach pain after sex. If it doesn't, or if you experience it consistently, Dr. Wider recommends consulting a healthcare provider for more personalized medical advice.