Nephrotic Syndrome: This condition is characterized by heavy proteinuria, leading to hypoalbuminemia (low albumin levels). Constipation and low abdominal pain can be associated symptoms, possibly due to edema or related to the underlying disease process affecting the kidneys.

Liver Cirrhosis: Liver dysfunction can lead to decreased albumin production, resulting in hypoalbuminemia. Constipation can occur due to decreased mobility or as a side effect of medications, and abdominal pain can be related to ascites or liver enlargement.
Malnutrition: Inadequate dietary intake or malabsorption can lead to low albumin levels. Constipation can be a symptom of malnutrition, and abdominal pain may be related to hunger or malabsorption issues.
Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease or ulcerative colitis can cause malabsorption, leading to hypoalbuminemia. Constipation and abdominal pain are common symptoms of IBD.

Bowel Obstruction: Although less likely, bowel obstruction can cause constipation and abdominal pain. If not promptly diagnosed and treated, it can lead to severe complications, including bowel ischemia and perforation.
Ovarian Torsion: In females, ovarian torsion can present with severe abdominal pain and may be associated with constipation due to pain or decreased mobility. This is a medical emergency requiring immediate attention.

Amyloidosis: A rare condition characterized by the deposition of amyloid proteins in various tissues, including the kidneys, liver, and intestines. It can lead to hypoalbuminemia, constipation, and abdominal pain, but it is much less common than the other listed conditions.
Whipple's Disease: A rare, systemic bacterial infection that can cause malabsorption, leading to hypoalbuminemia. Symptoms include abdominal pain, diarrhea (less commonly constipation), and weight loss.