Hello dear, The causes of constipation can be: 1. Any pathology/ sub acute obstruction in the Gastrointestinal tract. 2. Irritable bowel syndrome- constipation predominant type. 3. Functional cause- due to decreased gastric motility. 4. Inadequate intake of fluids and fiber rich diet. 5. Hormonal & Metabolic causes, etc. Though symptomatic relief can be obtained by intake of laxatives like Laxido or Picolax, the underlying cause needs to be treated. So, it will be better to consult a Gastroenterologist for a proper clinical examination. Investigations like complete blood count, stool examination, Ultrasound scan of abdomen, Colonoscopy & contrast studies will be helpful to rule out any pathological cause for your symptoms. Till then, maintain adequate hydration & proper nutrition status. Wishing a good health. Take care.