Hajj contain pilgrims from 185 countries including the resident of Saudi Arabia, the total population of the pilgrims approximately 2 million. The pilgrim population is extremely diverse regarding the ethnic origin, socioeconomic status, sex, age, and health status, travel to holy site to accomplish same activities within comparatively short period over limited area of land. Archaeologically hajj has experienced high morbidity and mortality due to pre-existing comorbidities, outbreaks, accidents, and disasters. This study should be considered with its limitations. The sample was biased since the participants were attending PHCCs. Also, the data was collected from PHCCs; thus, it is likely that individuals with severe conditions were not included. A random sample would have been more representative of the population. Also, there was no information about referrals to tertiary hospitals or mortality-related information. However, the study design made it possible to obtain information about the chief complaints among pilgrims attending PHCCs.In conclusion, the most common chief complaint was respiratory-related illness followed by trauma/injury-, musculoskeletal/pain- and gastrointestinal system-related illnesses. Our data showed that the peak of the visiting PHCC occurred in day 9.