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 to form a semilunar, convex, lateral, curved tendinous structure, known as a semilunar line. The protrusion of the peritoneum or intra-abdominal organs through the lateral border of the rectus abdominis muscle at the semilunar line is called a semilunar hernia, also known as a lateral abdominal wall hernia. spige first described the anatomy of the semilunar line, hence the name spigelian hernia. The differential diagnosis of this disease is as follows: A palpable, painful mass in the left lower abdomen May be seen in ulcerative colitis, rectal, and sigmoid colon cancer. Schistosomal granuloma of the rectum and sigmoid colon, left ovarian cystitis, etc. Cystic mass with pressure pain in the left upper abdomen Cystic inflammatory mass with significant pressure pain in the left upper abdomen. If the mass is palpated in the middle of the upper abdomen it is often a tumor, cyst or intra-gastric stone of the stomach or pancreas. Epigastric masses Various causes of epigastric lesions with masses on palpation. It is commonly seen in liver cirrhosis, chronic pancreatitis, gastric cancer, gallbladder cancer and other diseases.