When there is infection in membrane of bladder the same results into condition known as Cystitis.
This could be caused due to abnormal growth of prostate gland, retention of urine, septic occurring due to improper usage of instruments or to say invasive instruments triggering infection in walls of bladder, E-coli bacteria can lead to this situation, urine passed through painful and burning sensation or pain in lower abdomen after passage of urine or blood passed into urine, ulcers present in bladder are some few reasons that may lead to infection in bladder.
As corrective measure normally antibiotics can be suggested to overcome such infections subject to results of urine tests. Patients may be advised to take fluid to enable free and proper flow of urine. The diet generally with liquid fluids and one that would not cause burning/irritation can be suggested.