Welcome to HCM
You are suffering from Ulerative colitis for last 6 years,as you rightly pointed out it has remission and sometimes flares up.you have taken right medical treatment but do not give up keep taking treatment regularly with follow up with Gastroenterologist/Physician.
Eye itching and pimples may be due to some allergy or hormone changes for which consult dematologist.
Tomato use may cause flare up of condition as food allergy
so if it is there avoid taking tomato.
Suitable antibiotics are used if used in excess without advise of doctor can lead to pseudomembranous colitis
must be differentiated. Pseudomenbranous colitis is caused by Clostridium difficile
.so it is the judicious use of antibiotic when required is of utmost importance.
Treatment is by 5ASA (Mesalamine
)and steroids,usually control symptoms and flare ups.
Oral steroid therapy and other immunosuppressive therapy
are used in refractarary patients for which you should see your treating Gastroenterologist.
In case of complications and Failure of medical therapy, including frank failure, incomplete response leading to limitation of life-style, satisfactory response but corticosteroid dosage is prohibitive, complications of corticosteroid therapy.
On Ayurvedic treatment I can not comment ,that is your choice.
Hope this information helps.
Good Luck to you.