causes of back ache:-Muscle or ligament strain. Repeated heavy lifting or a sudden awkward movement may strain back muscles and spinal ligaments. If you're in poor physical condition, constant strain on your back may cause painful muscle spasms.
Bulging or ruptured disks. Disks act as cushions between the bones (vertebrae) in your spine. The soft material inside a disk can bulge or rupture and press on a nerve. However, you can have a bulging or ruptured disk without back pain. Disk disease is often found incidentally when you undergo spine X-rays for some other reason.
Arthritis. Osteoarthritis can affect the lower back. In some cases arthritis in the spine can lead to a narrowing of the space around the spinal cord, a condition called spinal stenosis.
Skeletal irregularities. Back pain can occur if your spine curves abnormally. Scoliosis, a condition in which your spine curves to the side, also may lead to back pain, but generally only if the scoliosis is severe.
Osteoporosis. Your spine's vertebrae can develop compression fractures if your bones become porous and brittle
pain relievers. Acetaminophen (Tylenol, others) or nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve), might relieve acute back pain. Take these medications as directed by your doctor, because overuse can cause serious side effects.
If OTC pain relievers don't relieve your pain, your doctor might suggest prescription NSAIDs.
Muscle relaxants. If mild to moderate back pain doesn't improve with OTC pain relievers, your doctor may also prescribe a muscle relaxant. Muscle relaxants can make you dizzy and sleepy.
Topical pain relievers. These are creams, salves or ointments you rub into your skin at the site of your pain.
Narcotics. Certain drugs, such as codeine or hydrocodone, may be used for a short time with close supervision by your doctor.
Antidepressants. Low doses of certain types of antidepressants — particularly tricyclic antidepressants, such as amitriptyline — have been shown to relieve some types of chronic back pain, independent of their effect on depression.
Injections. If other measures don't relieve your pain and if your pain radiates down your leg, your doctor may inject cortisone — an anti-inflammatory medication — or numbing medication into the space around your spinal cord (epidural space). A cortisone injection helps decrease inflammation around the nerve roots, but the pain relief usually lasts less than a few months.
Physical therapy and exercise
Physical therapy is the cornerstone of back pain treatment. A physical therapist can apply a variety of treatments, such as heat, ultrasound, electrical stimulation and muscle-release techniques, to your back muscles and soft tissues to reduce pain.
As pain improves, the therapist can teach you exercises that can increase your flexibility, strengthen your back and abdominal muscles, and improve your posture. Regular use of these techniques can help prevent pain from returning.
Few people need surgery for back pain. If you have unrelenting pain associated with radiating leg pain or progressive muscle weakness caused by nerve compression, you may benefit from surgery. Otherwise, surgery usually is reserved for pain related to structural problems, such as narrowing of the spine (spinal stenosis) or a herniated disk, that hasn't responded to other therapy.
consult orthopedician for further evaluation and treatment.