Causes of lumps in the groin include a hernia, swollen lymph glands, sexually transmitted diseases such as gonorrhea, and saphena varix, a lump that disappears when the sufferer lies down, according to Healthline. Some groin lumps are harmless cysts while others indicate a more serious condition.
Groin lumps are painful or painless swellings in the area between the trunk and legs, explains Healthline. The lumps come in different shapes and sizes and can occur alone or in groups. All lumps require medical attention, as some lumps signify serious health conditions. Depending on the cause of the groin lump, treatment may include antibiotics or surgical excision.