system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do we get itchy when we are sweating while sitting/ laying on grass fields?

Wow, I dunno what to say, this blew up. Thanks for all the responses everyone!
gpt
Even for those without allergies, grasses and plants contain many organic compounds, like phenolic acids, that can be a skin irritant. Parts of the grass (especially freshly cut, dry grass) can also cause mechanical injury to the skin and elicit an itching response.

Sweating likely dissolves these irritating compounds and allows for closer contact with the skin.