How can i cure constipation fast on my period on the first day of my every period i always am constipated on that day whats some natural remedies that will help me cure it fast and how can i prevent this in the future ?

No other disease?: Each person with constipation needs to be sure there is no other disease causing it. If constipation is just due to slow movement of the food and poop through the gut, then the things to try are vegetables, water, prune juice, prunes, fiber with water, and plenty of exercise. If not better, there is Miralax, Senokot or other senna, milk of magnesia, other laxatives... plus her doctor can evaluate.