What are the most common symptoms of pyelonephritis?

Some sxs. Symptoms include:pain in the abdomen, lower back, side, or groin, frequent urination, urgent urination producing only a small amount of urine, burning pain with urination fever and chills, nausea and vomiting, pus and blood in the urine, loss of appetite etc.
Pyelo. The most common symptoms are fever, pain with urination, nausea and vomiting. Often with pyelonephritis you can get flank pain. Sometimes the symptoms are so severe patients are hospitalized for IV antibiotics, but other times you can be treated with oral antibiotics and close followup with a physician.
Fever & back pain. Acute pyelonephritis often presents with fever, chills, back or flank pain, nausea and vomiting; on exam, there is usually pain at the lower back or flank region. It requires treatment with appropriate antibiotics (usually iv). Usually resolves with correct treatment, but recurrent or chronic forms can cause kidney disease or scarring of the kidney or drainage system to the bladder.