Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain the symptoms of constipation that occurs 5-7 days after periods seems to be due to changes in hormonal levels in body..
While other common causes can be sudden changes in dietary habits, excess intake of antacids,
irritable bowel syndrome, excess intake of dairy,eating disorders, lack of appropriate physical activity, side effects of medicines,
Hypothyroidism etc.
You should continue taking a high fibre diet and also drink ample of water..
Incorporate more of fruits, green vegetables and salads in diet..
Start doing regular workout and take walk after meals..
Eat in small portions of food ever y 2 hours..
In case of no improvement or recurring problem
consult a Gastroenterologist and get evaluated and he can advise you get investigations done like Colonoscopy, Barium swallow, hormonal assy etc to confirm the cause..
Treatment of the cause can relieve the symptoms..
You can also be advised to take laxativs like
Polyethylene glycol [Miralax], castor oil also acts as a lubricant and laxative..
You can also be advised to take Psyllium husk or Lactulose..
You can also be advised medications like
Lubiprostone or Linaclotide..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.