The situation of having blotches; blotchiness.(noun)
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Use "blotching" in a sentence
"In fact, the only symptom not found in reports of nerve gas exposure is the peculiar skin "blotching" that afflicted some of the Palestinian victims."
"An example of this is red "blotching" in meat that sometimes occurs because of excess stress placed on a lamb when it is getting ready to be stunned for slaughter."
"For instance, the holly leaf miner, whose nondescript larvae cause leaf blotching at this time of year – their entire world is limited to that tiny strip between the top and bottom of a single leaf."