I have lupus sle. i've been very dehydrated for over 2 mths, causing my heart rate to spike to 148. i drink approx. 90 fl oz/day but only urinate once a day. what should i be concerned about?

Kidney failure: You should be worried about kidney failure which sle can cause. You need blood tests.

Lupus and kidney: Lupus can affect many organs, and the kidney involvement is one of the most important. Hydration and urination appear to be impaired in your situation, so i would be concerned about your kidney function. A blood test of the electrolytes, bun, creatinine, GFR as well as a urinalysis and 24 hour urine collection of protein and creatinine clearance will help your doctor assess this.

SLE- multi system: Your spike in heart rate is not due to dehydration. Sle can involve the kidneys & heart & many more systems.Regular check up of kidney functions needed.You need to be followed by a rheumatologigt if possible or a good internist.