Muscle cramps are the most common cause of pain in the lower back. The treatment is usually based on relaxing the tension in the muscles. The risk of cramps increases if the abdominal muscles are weak or the pelvis is leaning forward too much.
Around 80 to 90% of adults have felt lower back pain at some point, but the pain tends to appear more often with aging. Usually the pain appears for the first time between 30 and 50 years of age, mainly because of the sedentary lifestyle.
The logical solution would be to lie down and rest, but that might not be the best solution. One research showed that people who continued with their normal activities recovered earlier from the pain.
After the first burst of pain, the best solution is to rest for a day or two and treat the lower back with cold compress and then warm compress, to relax the muscles. Pain killers should be taken only if the pain is unbearable. It is recommended to stay as active as possible, take a walk every few hours.