Ice can play a role in reducing swelling, pain, hemostasis, and itching, and is often used on eyelids or other eye tissues, redness, bruising, hematoma, and pain caused by trauma, and cold compresses are also effective for allergic conjunctivitis, but remember that cold compresses should not be applied when accompanied by corneal ulcers and iridocyclitis. Hot compresses can improve circulation, reduce the inflammatory response, and promote the absorption of accumulated blood. It is commonly used clinically for acute inflammation of the eyelid and tear sac, iridocyclitis, and non-fresh subconjunctival hemorrhage and anterior chamber hemorrhage. Hot compresses are contraindicated in acute hemorrhagic disease, acute angle-closure glaucoma, acute conjunctivitis, and in eczema of the eyelid skin.