Expired makeup may not necessarily cause permanent damage, but it can certainly lead to various skin issues. Over time, makeup products can degrade and harbor bacteria, which can lead to skin irritations, infections, or allergic reactions.

The risks associated with using expired makeup include:

1. Skin Irritation: Expired makeup can cause redness, rashes, or dry patches on the skin.

2. Eye Infections: Using expired eye makeup, such as mascara or eyeliner, can lead to serious eye infections, including conjunctivitis or styes.

3. Acne Breakouts: Old and expired makeup can clog pores, leading to acne breakouts.

4. Allergic Reactions: The breakdown of certain ingredients in expired makeup can cause allergic reactions, resulting in swelling, redness, or blisters.

While these issues are generally not permanent, they can be quite uncomfortable and may require treatment. In rare cases, severe reactions or infections could potentially lead to longer-term issues. Therefore, it's always best to use makeup products within their shelf life to ensure safety and efficacy.