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[|Human|] Sudden lower - middle back pain . swollen middle back each side of spine puffy and hard. Started 2 days ago Sudden lower - middle back pain 2days now swollen each side of spine aprox 6 inch hard and red. Like there is fluid build
[|AI|]  Hi. Sudden lower backache could mean a spasm of the muscle due to some recent activity which had an impact on the back, as in lifting of weights, two-wheeler rides, trauma/a fall etc. these could also lead to temporary changes, which manifest with tenderness, swelling and a lower back pain. Sometimes this could even mean an infection of the vertebra of the back you must be very careful. Minimize all your activities to possible extent, lie flat on your back on a hard mattress avoid soft cushions, take a painkiller and wait for a day, the swelling may come down. See a doctor preferably an Orthopedic for an examination, do not life heavy weights and ride two-wheelers or even pillion. Follow the right posture for the back when at work. Wish you good health