Laser Acupuncture on Irritable Bowel Syndrome in Females

Inclusion Criteria: * All participants will meet diagnostic criteria (Rome IV) for IBS-C * Their age will range from 20-35 years old * Their body mass index (BMI) will range from \>18.5kg/m2 and \<29.9kg/m2 Exclusion Criteria: * Taking medications known to cause constipation * Any organic diseases that might induce constipation such as colorectal cancer, metabolic disorders, multiple sclerosis, or neurological disorders * Organic diseases of the small or large intestine such as ulcerative colitis and Crohn's disease * A history of gastrointestinal surgery (other than appendectomy or cholecystectomy) * Mechanical obstruction * Serious concomitant disease of the heart, liver, or kidney or diabetes * Pregnant or lactating women * Severe psychiatric disorders * Knowledgeable of acupoints and meridians that might unblind the treatment.