Patients of study group was received a dose of 30 grams Gum Arabic per day as oral solution (dissolved in 250 ml purified water) for six weeks along with the chemotherapy prescribed addition to verbal instructions pertaining to the optimal nutrition and daily routine for oral hygiene.

Patients of control group was received only chemotherapy regimen and verbal counseling pertaining to the optimal nutrition and daily routine for oral hygiene.

Gum acacia, also known as Gum Arabic is exuded from acacia trees; mainly from Acacia Senegal (gum Hashab or Kordofan gum) which was used in this study.

The primary outcome measure of oral mucositis in cancer patients who received chemotherapy was depend on presence or absence oral mucositis after commencement the treatment because they were new diagnosed cases and free from oral mucositis. World Health Organization Mucositis Scale, was the scoring system used to assess oral mucositis based on a combination of subjective (soreness as described by the patient), objective (presence of erythema and ulcerations) and functional (ability to eat solids, liquids or nothing by mouth) outcomes.

During six weeks of follow up there were specific questions that asked by researcher and had been answered by patient regarding oral mucositis. Those questions summarized as follow: 1. Does the oral mucositis was occurred during this week? 2. If Yes. Is there was soreness, erythema or ulcers in mouth of participant? 3. The day that oral mucositis was started and eliminated? 4. If the patient belong to study group; Is Gum Arabic still used regularly?