Hogweed sap causes deep chemical burns and lifelong scarringContact with hogweed leads to deep chemical burns that require prolonged treatment and can result in lifelong scarring. The plant's sap causes painful wounds that typically take several weeks to heal. Injuries to the legs typically result in a loss of working capacity for up to three weeks. 1 in the Krasnodar Territory, noted that prolonged contact, especially in children, can lead to skin grafts or significant cosmetic impairment. Sap is released from any part of the hogweed plant, and burns may not appear immediately, sometimes manifesting up to 24 hours after contact.