my urine was 4 times acidic than it should be
Alkaline diet is obviously because my ph is too acidic in my body
To be clear, your urine showed acidic? But not actually the blood?
What other causes are there for high acidity in my urine?
One reason could maybe be your body tries to get rid of acidity.
Blood ph is usually measured with an arterial or capillary blood gas analysis. Had them 4 times, and each time consistently highly alkaline (~7.48; 7.35-7.45 normal range). Interestingly 2 of those ABGs occurred concurrent with urine analysis. Once with 3.8, the second with 7 as ph result (4.5-8.2 normal range) within one year.
Which shows blood can be highly alkaline with very acidic urine at the same time.
By the way, my 4 plasmodium falciparum malarias have been diagnosed by looking at my red blood cells under a microscope in Africa. Which is the usual method to diagnose it there.