I am 77 years this the first time I had swollen and red eyes why?

Answer 1

Consult an Ophthalmologist.
Links:
https://medlineplus.gov/ency/article/001...
https://en.wikipedia.org/wiki/Conjunctiv...

Answer 2

Some kind of allergy, see your Doctor or pharmacist.

Answer 3

Isn't a bit late in the day for you to take drugs?

Answer 4

Gas.