Lower stomach pain?

Many possibilities: There are so many different diseases that cause abdominal pain that it would be impossible to speculate on the cause of yours with such limited information. Any abdominal pain that is persistent, recurrent, or severe warrants medical evaluation, at the very least, by your primary care physician, or, by an er physician, if severe. Sorry i couldn't help more.

Dr Villaplana agreed

Abdominal Pain: Abdominal pain and the associated possibilities of diagnoses are endless. It is important to talk to a doctor to obtain a detailed history, a thorough exam, and tests that can confirm or rule out what we suspect you may have. Without this, we can only take an educated guess based on what's common. You may have ovarian cysts, pelvic infection, appendicitis, diverticulitis, bladder infection, hernia.

Many things: Constipation, bladder issues, herniae? Pulled muscles? Gyne issues in women and testicular issues in men? Inflamed lymph nodes? See your primary doctor for an eval.