From the Guidelines

Yes, celiac disease (CD) can present with constipation and abdominal pain.

Celiac disease can manifest with a variety of gastrointestinal symptoms, including constipation and abdominal pain 1.
The Gastrointestinal Symptom Rating Scale (GSRS), which is used to assess symptoms of gastrointestinal diseases, includes constipation as one of its domains, highlighting its relevance in the context of celiac disease 1.
Abdominal discomfort is another domain in the GSRS, further supporting the possibility of abdominal pain being a presenting symptom of celiac disease 1.

The presence of constipation and abdominal pain in celiac disease is not as widely recognized as other symptoms like diarrhea, but they are nonetheless important considerations in the diagnosis and monitoring of the disease 1.
A Celiac Symptom Index has been developed to specifically measure and monitor celiac disease-related symptoms, which may help in identifying and managing patients with atypical presentations like constipation and abdominal pain 1.

From the Research

Celiac disease (CD) can present with a range of symptoms, including atypical gastrointestinal symptoms such as constipation and recurrent abdominal pain 2.
The disease can begin with diarrhea and weight loss, but also with constipation and recurrent abdominal pain, or it could be completely symptomless 2.
CD is a systemic condition of autoimmune origin, affecting genetically predisposed individuals who at some point lose tolerance towards dietary gluten, and can display different clusters of clinical symptoms in the pediatric and adult population 3.

A study found that patients with celiac disease on a strict gluten-free diet had a higher prevalence of functional abdominal pain disorders (FAPDs) and functional constipation (FC) compared to controls 4.
The study also found that irritable bowel syndrome (IBS) and FC were more prevalent in patients with celiac disease than controls, with relative risks of 2.3 and 2.1, respectively 4.
Another study found that indications for repeat small bowel biopsy in children with CD included abdominal pain, diarrhea, and constipation, but persistent constipation was not associated with persistence of mucosal injury 5.

The identification of CD is challenging because it can present with a range of symptoms, including atypical gastrointestinal symptoms such as constipation and recurrent abdominal pain 2.
The diagnosis of CD relies on the combination of serum autoantibodies and duodenal biopsy showing villous atrophy, crypt hyperplasia, and intraepithelial lymphocytes 3.
The routine use of antibody markers has allowed researchers to discover a very high number of 'borderline' cases, characterized by positive serology and mild intestinal lesions or normal small intestine architecture, which can be classified as potential CD 2.