Why is my lower back in pain?

See your doc. See your doctor for an evaluation as it is hard to tell without all the info.
Possibly Arthritis. Most chronic low back pain comes from the chronic inflammation of the facet joints of the spine. These inflamed joints, like any joint in the body, causes pain with movement. There can also be a lot of muscle/soft-tissue based symptoms over lying the joints that can hurt as well. Acute pain can be strain but chronic pain is usually from real pathology.

Related Questions

Why do my lower back experience pain instead of legs after my sports?

Back pain exercise. Could be for a lot of reasons. The most common reason for back pain after running is probably related to a deconditioned back. Often your back will hurt if you have tight hamstrings which changes the tilt of your pelvis and puts strain on your back. Outside of that weak abdominal muscles will contribute to back pain. Adding hamstring stretching and core body exercise will help. Ie yoga, etc. Read more...
DOMS. Soreness in the lower back can be common after vigorous exercises that require extreme bending or twisting of your back. Delayed onset muscle soreness (doms) is a well-known physiologic condition that can cause pain in poorly conditioned muscles. If the pain does not subside after 72 hours following exercise, a more serious injury may be present. Consult with your physician if this is the case. Read more...

Why is my lower back pain worse when resting, contrary to what I thought?

See below. Often patients feel the pain more at rest. I may be related to the underlying problem, or it may be that you simply notice it more when you are less active and thus not "distracted" by other activity. Read more...

Can you tell me why I have my lower back pain?

Muscle ,disc, nerve. There are many reasons but most common is sprain/strain due to overuse or injury. Degenerative disc disease, herniated disc. Sciatica, rheumatoid arthritis, kidney stones. Pyelonephritis, piched nerve, fracture of spine, infection of disc or spine, malignancy of spine, osteoporosis, pyelonephritis, and several other problems can give you back pain. And this is not exhaustive list either. Read more...

Why when my lower back hurts the pain shoots up all the from my fingers down to my toes?

Better get seen. Back pain with symptoms that radiate into your legs can be a sign of nerve compression. Its best to have a doctor take a close look at this problem. It can be just muscular, but it can be a herniated disc (like I have in my back) or other problem pressing on the nerves. A physical exam by an experienced doc can help distinguish the serious from the not so serious causes of this type of pain. Read more...

Can you tell me why I have my severe lower back pain?

Severe. May be of concern. If with fever, not good. Causes otherwise include herniated disc, inflamed facets. Should have it checked. Read more...