Abdominal pain Blood Pressure - high Body - inflammation
Face - swelling Fever Foot - swollen
Urination - pain Urination - decrease Urination - frequent
Urination - scanty Urine - dark color Urine - with blood
Vomiting Weight - gain  
Nephritis is the inflammation of one or both kidneys.

Nephritis is usually classified by location:

- Glomerulonephritis. The term is also used instead of nephritis and refers to the inflammation of the glomeruli.
- Interstitial nephritis, also called Tubulo-interstitial nephritis, affects the interstitium (spaces between the renal tubules) of the kidneys.

In addition, nephritis can be classified by causes:

- Lupus nephritis is caused by systemic lupus erythematosus, which is an autoimmune disorder.
- Pyelonephritis is due to a urinary infection.
- Heredity factors (very rare).
- Athletic nephritis may appear from physical stress.
- Medication. Mainly produced by long-term intakes or side effects of certain drugs.

There are many factors that can cause nephritis. However, autoimmune disorders and infections are the most commonly known. A recent episode of strep throat or bladder infection can be indicator of infectious nephritis.

When the kidney is inflamed, it also filters out proteins from the blood, a condition that is called proteinuria. If the kidneys suddenly become inflamed, then the condition is called Acute nephritis. 
Doctors may order the following tests and procedures to confirm the diagnosis:

- Biopsy of the kidneys.
- Urine test.
- Blood test.
- Ultrasound.
- Imaging tests (CT, MRI). 
  More information:
Nephritis Treatment
Nephritis Healthcare Centers

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