the patients will be treated by using oral care only and evaluation will be done before cancer treatment and weekly till the treatment completed. In each weekly visit, oral sites will be examined, and a score was given to each site based on the degree of mucositis.

All patients were advised to rinse 15 mL of the solution benzydamine for 2 min, four to eight times daily before and during, and for 2 weeks after completion of cancer therapy. In case of any problem (e.g. burning or stinging), patients will be allowed to dilute the solution with water in the ratio 1:1 or 1:2. Study evaluations will be conducted before cancer treatment and weekly thereafter until 2 weeks after completion of the therapy .In each weekly visit, oral sites were examined and a score was given to each site based on the degree of mucositis.

the patients will be treated by using a low-level laser therapy, the irradiations will be done three times a week using low power laser with a wavelength of 870 nm. The irradiation mode will be punctual and in contact, perpendicular to the oral mucosa. The power will be 60 mW, energy density of 6 J/cm2. Irradiation time will be 6 seconds per point based on the laser beam spot size of 0.55cm2. The irradiations will be done intra-orally avoiding the tumor site, oral examinations will be recorded at each irradiation session and the degree of mucositis will be recorded.

0.15% bezaydamine hydrochloride was applied in oral mucosa in Patients with head and neck cancer under RT, CT treatment.

Unstimulated saliva (2 mL) were obtained after oral rinse with room-temperature water. It was be stored in sterile collection tubes that were labeled at - 80C. Enzyme-linked immunosorbent assays were used to quantify TNF-α amount in picograms.

Unstimulated saliva (2 mL) were obtained after oral rinse with room-temperature water. It was be stored in sterile collection tubes that were labeled at - 80C. Enzyme-linked immunosorbent assays were used to quantify IL-6 amount in picograms.

WHO scale scoring severity of oral mucositis by assessor as following:

Score 0-no signs or symptoms. Score 1-oral soreness and erythema. Score 2-oral erythema and ulcers, both solid and liquid diets tolerated. Score3-oral ulcers, liquid diet only. Score 4-oral alimentation impossible.

(NIC-CTC) RT-induced oral mucositis scale scoring extension of mucositid as following: (0) patients with oral mucosa presenting no visible alteration.

1. Presence of erythema.
2. Ulcers with up to 1.5 cm diameter and noncontiguous.
3. Ulcers larger than 1.5 cm diameter and contiguous.
4. Ulcers exhibiting necrosis and bleeding.
5. Death related to toxicity