How many teaspoons of pus come out of your face after a lifetime of acne?

Provide your method for figuring it out. Assume:

1. A "lifetime" is 86 years.

2. Of that, you have had significant (severe or cystic) acne since age 11.

3. You pop your pimples instead of letting them go down on their own.

4. Your acne is mostly restricted to your face.

We can't get extremely accurate measures, of course, but let's just see what we figure out!