My friend closed the bathroom door on her hand and her hand is swollen. What should we do?

If someone has closed a bathroom door on their hand and their hand is swollen, it is important to take action. They should first apply cold and hot compresses alternately to reduce swelling. If the pain persists, they can consider taking over-the-counter anti-inflammatory medication, as long as they have no allergies or contraindications. If the swelling and pain do not improve after 24 to 48 hours, or if there is limited movement or deformity, it is essential to seek medical attention promptly.