The Firestick plant, also known as Euphorbia tirucalli, contains a milky sap that can cause skin and eye irritation. It is important to handle the plant with care and avoid contact with the sap. If you do come into contact with the sap, wash the affected area with soap and water immediately. It is also advisable to wear gloves and protective eyewear when working with the Firestick plant to prevent any potential irritation or allergic reactions.