Acute kidney infection characterized by a sudden onset, the rise in body temperature, increasing intoxication and exsicosis. Kidney infection usually begins with severe, often unilateral pain on the lateral surface of the back below the costal arch. In some cases, pain may be localized in one of the flanks of the lower abdomen and to give (irradiate) in the groin. One or both kidneys may be enlarged and painful, the pain usually occurs in the lumbar spine on the affected side. Sometimes cramps abdominal muscles. A person may experience episodes of intense pain (renal colic), caused by spasms of one of the urethras. Cramps occur as from inflammation caused by infection, and from a strong stimulus for the passage of kidney stones.

The pain is often combined with fever, chills, nausea, vomiting, which does not bring relief. About a third of people with the disease and symptoms of kidney infection in the lower part of the urinary tract, including frequent and painful urination (called dysuria). When urination allocated turbid urine (in the presence of blood in it may acquire a reddish tint) with a sharp foul odor.

Chronic kidney infection differs of unclear clinical picture. In some cases the process takes a chronic course with no prior acute onset. The main kidney infection symptoms are chronic intoxication, delayed addition of body weight, pale skin, fatigue. Chronic renal disease occurs only in people who have any predisposing cause – full or partial occlusion (obstruction) of urinary tract, the large stones in the kidneys or the reverse current of urine from the bladder to the urethras in young children. Chronic renal disease may eventually damage the kidneys, to the extent that there is renal insufficiency.

In children, kidney infection symptoms are often mild and difficult to recognize. Prolonged inflammation of the pain may be vague, fever – is periodic or not occur at all. Older children may complain of pain in the lumbar region, but usually the children are not clearly localize the pain and complained of “abdominal pain”.

The most common symptoms of kidney infection are changes in urine – it becomes turbid due to leukocytes, protein, bacteria.

Thus, kidney infection symptoms may include:

• Disease begins acutely; there is high (up to 40 gr. C) temperature (fever), chills, heavy pot;
• Pain in the lumbar region, on the side of the affected kidney – stress the anterior abdominal wall, the sharp pain in the costovertebral angle;
• Malaise, thirst, dysuria or thamuria;
• Acceding headache, nausea, vomiting indicate a rapidly growing intoxication;
• Marked neutrophilic leukocytosis, aneozinofiliya, pyuria with moderate proteinuria and hematuria
• One or both kidneys may increase and become painful;
• Approximately 1 / 3 of people with kidney infection also experience symptoms of inflammation of the bladder (cystitis) – more frequent and painful urination.