A lateral abdominal wall mass with fixed pressure pain is the main clinical sign of a hallux valgus hernia. The anterior and posterior layers of the rectus abdominis sheath heal at the lateral edge of the rectus abdominis muscle, forming a semilunar, convex, lateral, curved tendinous structure known as a semilunar line. How is the disease diagnosed clinically? The main symptoms are pain at the meniscus and the presence of a localized mass, with or without symptoms of intestinal obstruction. The type, severity and location of pain vary depending on the contents of the hernia. The abdominal pain in atypical hallux valgus hernias is often not characteristic. Pain can be provoked by movements that increase intra-abdominal pressure and is relieved by rest. If a hallux valgus hernia becomes entrapped and localized severe pain occurs, this may be followed by manifestations of intestinal obstruction. A careful physical examination combined with imaging such as ultrasound or CT is usually sufficient to confirm the diagnosis. In patients with significant palpable masses, the hernia and its contents can be easily found after the tendon membrane of the external oblique abdominal muscle has been separated. Larger defects have some tension with direct suturing and can be repaired with a patch.