Lower back pain and groin pain can be an indication of other diseases and conditions such as epididymitis, kidney stone, orchitis, hernia and prostatitis, according to Healthline. Back pain can also be an indication of cancer, states PainScience.com.
Pain in the groin can be experienced due to an injury caused by a pull or strain of muscles, as is common with athletes. Another common cause of groin pain is inguinal hernia. This happens when an organ pushes through the muscles that protect it. This results in swelling in the groin that can be painful. Disorders and conditions such as a pinched nerve, intestinal inflammation, testicular inflammation, enlarged lymph nodes and a urinary tract infection can also cause pain in the groin, states Healthline.
Establishing the cause of pain in the lower part of the back, also known as lumbago, can be difficult given the complex nature of the back. However, conditions and disorders such as arthritis, fracture of one of the vertebrae, osteoporosis, a slipped disk, scoliosis, tumor and many others can be the source of pain, states NetDoctor.co.uk. Symptoms include pain in the lower part of the back, which sometimes extends to the thighs and the groin, and difficulty when moving the spine such as when bending and leaning. Sometimes the back becomes stiff as a result of tense spasm, and the back tilts to one side as a result of intense pain and spasm.