Abdominal wall strain or muscle pull: This is a common condition, especially in young and healthy individuals, often caused by overexertion, heavy lifting, or sudden twisting movements. The absence of fever, vomiting, and gastrointestinal symptoms supports this diagnosis.

Hernia: Although less common, hernias can cause abdominal wall pain without systemic symptoms. The pain is usually localized to the area of the hernia.
Costochondritis: Inflammation of the cartilage that connects the ribs to the breastbone can cause abdominal wall pain, especially if the lower ribs are involved.
Nerve entrapment or neuropathy: Compression or irritation of nerves in the abdominal wall can cause pain, often without other symptoms.

Ovarian torsion or ovarian cyst: Although less common, ovarian torsion or ruptured ovarian cysts can cause severe abdominal pain and should be considered, especially in female patients, even in the absence of gastrointestinal symptoms.
Appendicitis: Early appendicitis might present with abdominal wall pain before the typical migration of pain to the right lower quadrant. It's crucial to consider this diagnosis to avoid missing a potentially life-threatening condition.
Ectopic pregnancy: In female patients of childbearing age, ectopic pregnancy is a critical diagnosis to consider, as it can present with abdominal pain and minimal other symptoms initially.

Abdominal wall endometriosis: A rare condition where endometrial tissue grows in the abdominal wall, causing cyclic pain.
Desmoid tumor: A rare, benign tumor that can grow in the abdominal wall and cause pain.
Abdominal wall hematoma: A rare condition, often caused by trauma or anticoagulation, which can cause abdominal wall pain.