Heard that intestenial infection causes bad breath and if tha is true how that can be cured treated?

Hey !
You can treat & cure with Natural remedies . For more info : https://howtocure.com/essential-oils-for-lupus/

Ulcer is fully curable even without taking medicines.
If anyone really has ulcer pls let me know. I will cure it online just by acupressure

talk with a doctor
ulcers in the stomach are from a bacteria infecting liaisons in the linings and it is treated with an antibiotic
the bacteria is Heliobacter pylori and enters the stomach and live in the digestive tract
they cause sores ( ulcers) and if left untreated can cause stomach cancers
reference --www.webmd.com>digestive -disorders
go google and type in --bacteria causing stomach disorders---and read all about it
fixya site is not a medical forum so consult with a doctor as to the treatment

Avoid cold and dust. Use doxycycline long time. Use antu histamine.

I'm not a doctor, but the Flucloxacillin is a penicillin used against bacterial infections. So if you have a cold, which is mostly caused by a virus, it won't help. Please be cautious with penicillin, because not using it right, will cause bacteria to go resistant for it.
Always ask a doctor first before you use penicillin, and once started with it, always finish the cure, so you kill off all the bacteria in your body.
Look what Wiki has to say about this medicine:
Flucloxacillin Wikipedia the free encyclopedia

There are three excellent treats that improve the cat's breath: greenies, chicken breathies, and smelly cat chews. For more information on these treats, check out this website: http://ezinearticles.com/?Cat-Treats-With-Dental-Benefits---Three-Treats-to-Consider-For-Your-Pets-Bad-Breath&id=4282976