Answers

2014-11-24T09:25:46+05:30
Though Nettle is soft ...but it has many hair  like structures which may get insert in our fingers and releases irritating compound .. by which we feel very pain on our fingers......
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2014-11-24T10:23:17+05:30
Because nettle has small surface area , the amount of pressure will also be small which is enough to sting in the skin . 
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