Im constipated and i have like a tightness almost like a pulled muscle under my belly?

Consider alarm signs: Constipation & abdominal pain is first addressed by accompanying signs/symptoms that may localize the organ involved: vaginal discharge or bleeding, alteration in periods, pregnancy risk? Fever, nausea, vomiting, altered stool pattern, blood with stool, tenderness, distension? Painful urination, blood in urine? Recent trauma, herniations? Age? Gender? Risks? Also, what testing have you had?