CND-0128Swelling, pain and the whole body
Old claims, quoted verbatim: not medical advice. A warning sits above the claims and never hides them; no warning does not mean safe, only that no source here has flagged the plant.
then you may know as well the reason why Nettle-tops eaten in the Spring consume the phlegmatic superfluities in the body of man, that the coldness and moistness of Winter hath left behind.
and in Spring, if you please to boil the tender plant (but cut off the prickles, unless you have a mind to choak yourself) it will change your blood as the season changes, and that is the way to be safe.
Nicholas Culpeper, The Complete Herbal, a new edition (London: Thomas Kelly, 1850). Project Gutenberg eBook #49513. SRC-CUL-1850