Hello Lardman nettles can be more potent this time of year especially the little leaves ones,my mum moved a pot of Cyclamen last Sunday at 10am and brushed against what she thought was an Oregano plant it turned out to be a little nettle,by 2pm she was feeling dizzy and gasping for breath she had a portion tablet it calmed down next morning she was ok then started to feel I'll again when I got in at 3 30 Monday afternoon she wad laid out in a chair didn't know who she was or were she was,she went to bed,I rang the doctor at 5 30 he rang back she was having an allergic reaction to Citigliptin diabetic tablet ,,I was advised to get sugar into her so that the tablet had something to fight again jezza