Im haveing pains in my lower back?

Conservative: For most back pain conservative treatment is best including, rest, gentle massage, stretching, mild anti inflammatory medications, heat or cold packs and avoiding things that make the pain worse. If the pain is severe, persistent or associated with other symptoms,including weakness, numbness, abdominal pain or urinary symptoms it is best to get it checked out in a consultation

Strain? : Back pain is very common condition. A number of reasons including heavy lifting and poor posture will contribute. If the pain continues for a month consider to get it checked out

Back pain: Need more information on the back pain to answer. Most probably muscular, need to r/o urinary tract infection also If not get better on its own have yourself examined for proper diagnosis and treatment.