Vocal cord dysfunction (VCD) resulting in functional airway obstruction, life threatening symptoms and other serious pulmonary conditions. Aim: The study aimed to evaluate the effect of applying breathing and relaxation techniques on the morbidity associated with vocal cord dysfunction among asthmatic and patient with COPD patient. Design: A quasi experimental research design was utilized. Setting: The study was carried out in chest department at Aswan University Hospital. Subjects: A purposive sample of 90 patients with vocal cord dysfunction in asthmatic and COPD patient were enrolled in this study using pre and posttests. Tools: Two tools were used for collection of data: Tool I: Structured interview questionnaire, health relevant data, and pulmonary function measures. Tool II: Vocal Cord Dysfunction Questionnaire (VCDQ). Results: There were statistically significant difference between the mean and SD of Pulmonary Function measures 92.11±14.03, 10.70±.34, 83.44±13.79 & 496.66±105.08 after 4thday of application of the breathing and relaxation techniques. There were a statistically significant difference (0.034) between a symptoms pre and posttest. Conclusion: The study concluded that, breathing and relaxation techniques has a positive improvement in level of life threatening symptoms as difficulty of breathing & throat tightness , and morbidity associated with vocal cord dysfunction and function measures after 4 thday of application of the breathing and relaxation techniques. Recommendation: This study recommended that, the nurses should pay more attention to breathing and relaxation techniques as a simple, cheap and effective technique while taking care of vocal cord dysfunction among patient with asthma and COPD.