Urinary Tract Infection (UTI): Given the location of the pain, a UTI is a common cause, especially if accompanied by symptoms like dysuria, frequency, or urgency. The central lower abdominal area is where the bladder is located, making UTIs a plausible cause.

Appendicitis: Although appendicitis typically presents with pain that migrates to the right lower quadrant, it can initially cause central lower abdominal pain. It's a common cause of acute abdominal pain that requires prompt diagnosis.
Diverticulitis: Inflammation of the diverticula in the colon can cause pain, usually in the left lower quadrant but can sometimes be more central, especially if the sigmoid colon is involved.
Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease or ulcerative colitis can cause chronic abdominal pain, including in the central lower area, along with changes in bowel habits and possibly weight loss.
Kidney Stones: Nephrolithiasis can cause severe, colicky pain that may start in the flank and radiate to the lower abdomen, including the central area.

Aortic Aneurysm: An abdominal aortic aneurysm can cause central abdominal pain and is a medical emergency. It's less common but critical to diagnose promptly due to the high risk of rupture.
Ectopic Pregnancy: Although rare in males, it's theoretically impossible but included for completeness. However, in the context of this question, it's not applicable. Instead, consider Testicular Torsion as a do-not-miss diagnosis, which can cause lower abdominal pain radiating to the groin.
Bowel Obstruction: This condition can cause severe abdominal pain, vomiting, and constipation. It's a surgical emergency and must be identified quickly.

Mesenteric Lymphadenitis: Inflammation of the lymph nodes in the mesentery can mimic appendicitis but is less common. It often resolves on its own but can cause significant pain.
Intussusception: A condition where a part of the intestine slides into an adjacent part, which can cause abdominal pain, is more common in children but can occur in adults.
Ovarian Torsion: Again, not applicable to males but mentioned for completeness. In males, a rare condition like Spermatic Cord Torsion could be considered, though it's extremely uncommon.