Most common causes of the discolouration include: Medications amino-salicyclic acid derivatives mesalazine/paraaminosalycylic acid/sulfasalazine doxorubicin , hydroxocobalamin , ibuprofen, phenothiazines, phenolphthalein, propofol , rifampicin/rifampin Dietary ingestants beeturia , rhubarb, blackberries, food dyes Metabolic abnormalities porphyria , urate crystals Hydroxocobalamin Early features of cyanide poisoning include nausea, vomiting, headache, dyspnoea, tachypnoea, hypertension, tachycardia, collapse and seizures
OConnor JC, McCusker RH, Strle K, Johnson RW, Dantzer R, Kelley KW
Common signs include: Fatigue Weakness Anemia Pale or yellowish skin Numbness or tingling in the hands and feet Difficulty with balance Glossitis (a swollen, red tongue) Memory or concentration difficulties If you suspect you may have a vitamin B12 deficiency, consult your healthcare provider for appropriate testing and personalized recommendations
Most patients describe the sensation as a mild vibrating or prickling feeling
