skin irritation
4.Bathing or showering in contaminated water should be avoided, as skin contact with the algae can lead to skin irritation and rashes.
7.any of numerous plants having stinging hairs that cause skin irritation on contact (especially of the genus Urtica or family Urticaceae).
8.Any of numerous plants of the genus Urtica, having toothed leaves, unisexual apetalous flowers, and stinging hairs that cause skin irritation on contact.

