Detection Windows The window to detect the presence of a particular drug in a personâs urine is highly dependent on multiple factors, such as: Hydration-More dilute urine from high fluid intake may cause dilution of drug and therefore a negative result due to levels present but below the cutoff.
Alcohol flush reaction. Alcohol flush reaction is a condition in which an individual develops flushes or blotches associated with erythema on the face, neck, shoulders, and in some cases, the entire body after consuming alcoholic beverages.
Sinus congestion from alcohol is caused by an alcohol intolerance and high levels of histamine in alcoholic beverages, according to CNN Health. One of the first signs of alcohol intolerance and sensitivity to histamine is sinus congestion and flushing of the skin.