Please choose the correct ending to complete the given sentence: Health: [header] How to treat patellofemoral pain [title] Stay off your knee until the pain passes. [step] If you're experiencing pain in your knee, take some time to rest. Overexertion can make the pain worse, and possibly cause other complications.

Ending1: When resting, you should sit and lie down. Keep your legs shoulder-width apart and elevate the affected leg to support yourself while you're resting. Ending2: [title] Prop a rolled towel with your injured knee against the inside of your thigh. [step] This helps keep your knee elevated and you get warmth between your leg and the rolled towel. Ending3: Don't hit your knee with anything heavy, like a tennis ball, if you feel pain or significant swelling. If you have joint problems, ibuprofen may be able to help. Ending4: For a few days, avoid putting too much weight on the knee that is in pain. You may also want to refrain from certain activities that increase knee pain.

Answer format: ending1/ending2/ending3/ending4