Hi, I'm allergic to aspirin, can I still use aspirin as a mask on my face since I heard that it has a lot of benefits in treating acne scars?

Seek other treatment. If you are truly allergic to aspirin, then you should avoid it. However, you should visit your physician to discuss what reaction you had to aspirin and determine if it is a true allergy or side effects. The good news is that there are several treatments for acne scarring that do not involve aspirin that you can explore look at this recent study please: Good luck. http://tinyurl.com/jfj8.