The area between the scrotum and the thigh groove is often called the groin. Some patients may develop a bulge in the groin after being bitten by mosquitoes and insects, and if there are no obvious allergic symptoms, it can absorb on its own after a period of time without special treatment. In addition, patients with lesions of the skin, lymph and subcutaneous tissues in the groin may cause bulging in the groin: 1, inguinal hernia: patients who have inguinal hernia due to excessive abdominal pressure and other reasons, which causes patients to have symptoms of bulging in the groin, the bulge is mostly recoverable, some patients are accompanied by pain, and patients are advised to improve their groin through surgical treatment The actual fact is that the actual fact is that the particulars of the actuals are not really a lot of. In general, keep the skin clean, can use mupirocin, acyclovir and other topical drugs applied to the affected area treatment; 3, allergic diseases: if the patient is allergic to the groin contact substances, such as clothing, mosquitoes, etc., may be manifested as the groin bulge, mostly manifested as red papules, skin reddening, edema and other symptoms, it is recommended that patients use anti-allergy drugs, such as loratadine to relieve Allergic diseases; 4, cystic diseases: patients who have blockage of sebaceous ducts in the groin may also cause cystic lesions in the groin, manifesting as bulges in the groin, small cysts are mostly small rice-like bulges and are not accompanied by other symptoms, large cysts may appear skin reddening, edema. Small cysts do not require treatment, but large cysts often require surgery; 5. Lymphatic enlargement: because of the presence of lymph nodes in the groin, the presence of infection and tumors nearby can cause lymph node enlargement, showing the symptoms of bulging in the groin, usually can be found in the vicinity of the lesion, may be accompanied by pain, fever and other symptoms, patients are advised to timely anti-infection treatment; 6. If there is fluid metabolism disorder at the testicular sheath, a bulge may appear in the groin, and there may be a feeling of scrotal swelling or pain, accompanied by urinary dysfunction, and generally the fluid can be absorbed by itself, and if there is too much fluid, surgical drainage can be chosen to relieve the symptoms.