Signs and symptoms that may be seen in acidosis include headaches, confusion, feeling tired, tremors, sleepiness, flapping tremor, and dysfunction of the cerebrum of the brain which may progress to coma if there is no intervention. Metabolic acidosis
Metabolic acidosis may result  from either increased production of metabolic acids, such as lactic acid, or disturbances in the ability to excrete acid via the kidneys, such as either renal tubular acidosis or the acidosis of kidney failure, which is associated with an accumulation of urea and creatinine as well as metabolic acid residues of protein catabolism. An increase in the production of other acids may also produce metabolic acidosis. For example, lactic acidosis may occur from:

severe (PaO2 <36mm Hg) hypoxemia causing a fall in the rate of oxygen diffusion from arterial blood to tissues. hypoperfusion (e.g., hypovolemic shock) causing an inadequate blood delivery of oxygen to tissues.A rise in lactate out of proportion to the level of pyruvate, e.g., in mixed venous blood, is termed "excess lactate", and may also be an indicator of fermentation due to anaerobic metabolism occurring in muscle cells, as seen during strenuous exercise. Once oxygenation is restored, the acidosis clears quickly. Another example of increased production of acids occurs in starvation and diabetic ketoacidosis. It is due to the accumulation of ketoacids (via excessive ketosis) and reflects a severe shift from glycolysis to lipolysis for energy needs.
See also
Bartter syndrome
Gitelman syndrome
Hypokalemic acidosis
Potassium deficiency (plant disorder)
Superior mesenteric artery syndrome

References
Further reading
Firth, J (2010). "Disorders of potassium homeostasis". In David A. Warrell; Timothy M. Cox; John D. Firth; Graham S. Ogg (eds.). Oxford Textbook of Medicine. Vol. 1 (5th ed.). Oxford: Oxford University Press. pp. 3831–3845. doi:10.1093/med/9780199204854.003.210202_update_001. ISBN 978-0199204854. Greenlee, M; Wingo, CS; McDonough, AA; Youn, JH; Kone, BC (May 5, 2009). "Narrative review: evolving concepts in potassium homeostasis and hypokalemia" (PDF). Annals of Internal Medicine. 150 (9): 619–25. doi:10.7326/0003-4819-150-9-200905050-00008. PMC 4944758. PMID 19414841. NIHMSID: NIHMS800438. External links
Content of Selected Foods per Common Measure, sorted by nutrient content (Potassium)
List of foods rich in potassium (U. Mass. Med.) National Organization for Rare Disorders: Hypokalemia