Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain pus pocket in mouth along with headache seems to be due to deeply decayed tooth that is leading to pus formation below the root tips of tooth leading to
dental abscess formation..
I would suggest you to consult an Oral Surgeon and get evaluated and an
x ray can help in confirmation of cause..
But as you already have failed
root canal extraction of tooth followed by antibiotics and painkillers is an appropriate treatment..
You can proceed with a bridge placement in case if you cannot afford implant..
Secondly eye discharge along with mucous can be due to infections like Conjunctvitis, Blepheritis, eye alleries etc..
So in case if you are advised with allergies anti allergics can help in providing relief..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.