Hidden pain on the right side of the lower back may be caused by strain injury, lumbar spine lesions, inflammation, herpes zoster and so on. 1. Strain injury: mostly seen in long-term work, engaged in heavy physical labor, due to muscle, ligament and other soft tissue damage caused by pain. 2. Lumbar spine lesions: including lumbar disc herniation, lumbar spine slipped, etc., which presses on blood vessels or nerve roots and causes pain. 3. Inflammation: common in fasciitis, arthritis, rheumatoid arthritis, etc., inflammation stimulation induces vague pain. 4. Herpes zoster: usually caused by decreased immunity, it will manifest as vague pain in the early stage, and herpes will appear in groups in the waist in the later stage. 5. Others: Kidney stones, urinary tract infections, dermato-neuritis, etc. radiate the pain to the lower back, resulting in vague pain. The hidden pain on the right side of the lower back alone cannot clarify the cause of the disease. If the symptoms persist for a longer period of time or continue to worsen, it is recommended that you seek medical attention as soon as possible to avoid delaying your condition.