Why does the lower left abdomen hurt when pressure is applied?

The causes of pain in the left lower abdomen when exerting include: 1. Intestinal issues: Intestinal diseases such as chronic enteritis, colitis, and irritable bowel syndrome may cause damage to the intestinal mucosa or intestinal dysfunction, resulting in pain during exertion. 2. Gynecological inflammation: For women, pain in the left lower abdomen upon exertion may be related to gynecological inflammation, such as left pelvic inflammatory disease or salpingitis. Local tissue adhesions caused by inflammation may trigger pain during exertion. 3. Urinary tract stones: During their passage, kidney stones, bladder stones, or other stones that become lodged at a certain point in the left ureter can also cause pain in the left lower abdomen when straining. 4. Muscle strain: Abdominal muscle strain also can cause pain in the left lower abdomen during exertion. This may be due to prolonged postures that lead to muscle tension or injury.