Chemical burns can happen if a solid or liquid chemical or chemical fumes get into the eye. Many substances will not cause damage if they are flushed out of the eye quickly. Acids and alkali substances can damage the eye. It may take 24 hours after the...
A productive cough produces phlegm or mucus (sputum). The mucus may have drained down the back of the throat from the nose or sinuses (postnasal drainage) or may have come up from the lungs. A productive cough generally should not be suppressed; it clears...