IRCT20200905048623N1 IRCT 2020-09-21 Islamic Azad University Evaluation of the effect of adding low level laser irradiation to drug therapy in patients affected with burning mouth syndrome: A randomized clinical trial Evaluation of the effect of adding low level laser irradiation to drug therapy in patients affected with burning mouth syndrome: A randomized clinical trial 2019-10-23 anticipated 46 Complete https://irct.ir/trial/50739 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Crossover, Purpose: Treatment, Randomization description: Simple randomized,individual unit Using a table of random numbers,no concealment. 3 Burning mouth syndrome. Intervention 1: Intervention group 1: The drug given to all patients is citalopram, the initial dose of which is 10 mg and after one week it is increased to 20 mg and used once a day for one month and in half of the patients, after one week from the start of drug treatment, laser treatment will be performed. In the intervention group, low power Thor DD2 (control unit,Thor,London,UK) diode laser with 810 nano meters wavelength and 0.5 watt power and continuous radiation is used about 15 seconds for each area were affected. The laser is performed about 3 times in a week for up to 4 sessions. The diameter of the probe tip is 1 centi meter(cm), the cross-sectional area is 0.785 cm2 and the energy density is 9.5 joules / cm2. Intervention 2: Control group: The drug was given to all patients with citalopram (Sobhan Daru, Iran) whose initial dose was increased to 10 milligrams and after a week to 20 milligrams and used once a day for one month and half of Patients who do not receive laser treatment are in the control group. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no more information.