1 Both of these problems usually cause pain. Painless bleeding may signal a more serious problem, such as cancer.  Dark or orange urine. If your urine is dark or orange â particularly if you also have pale stools and yellow skin and eyes â your liver might be malfunctioning.
Burning sensation in the body may be cause by problems in the nervous system. Nerves that send message to the brain and spinal cord may be damaged and this condition is known as peripheral neuropathy. This, most of the time causes burning sensation accompanied by loss of muscle control, pain and lack of sensations. In other cases burning sensations might be brought about by neuralgia whose symptoms may include lack or loss of motor skills, numb feet, abnormal sensations and tender skin.
Urethritis: Burning urination is often the result of urethritis, the infection of the urethra. In men, urethritis can also cause penile discharge. Pyelonephritis: Pyelonephritis occurs when a bladder infection spreads to the kidneys. It can cause upper back and flank pain, shaking, chills, nausea and vomiting.