It is less that it causes heat strokes specifically, and more that the symptoms are similar. Hamon is akin to radiance, [he explains, allowing it to come over his hand.] The energy of life, but condensed for greater force. It isn't meant to harm living beings, but to be overloaded with such energy can certainly cause harm of a sort- disrupting the rhythm of another's life, in particular.

It needs to be handled with quite a lot of concentration and precision to reach such a point however! [he adds, explaining further-] With typical matters, it helps to hasten healing if anything.

[Energy of life and all that.]