Dysphagia After Stroke: Causes, Warning Signs and Speech Therapy

World Stroke Day on 29 October is a powerful reminder that surviving a stroke is just the beginning of a long journey. Beyond the well-known effects on movement and speech, one of the most common yet least visible consequences is post-stroke dysphagia — difficulty swallowing safely. Studies show that between 40 and 78% of stroke survivors experience some degree of swallowing impairment in the acute phase. If you or someone you love is struggling to eat or drink after a stroke, this article will help you understand what is happening and what can be done.

What Is Post-Stroke Dysphagia and Why Does It Happen?

Dysphagia is the clinical term for any difficulty in the swallowing process — from preparing food in the mouth to moving it safely into the stomach. A stroke damages areas of the brain that coordinate the more than 30 muscles involved in that process. Depending on which brain region is affected, different phases of swallowing can be disrupted. The encouraging news is that, with early and specialist speech therapy, many survivors regain functional and safe swallowing.

Which Brain Areas Are Involved?

Swallowing is both a cortical and subcortical process. A stroke can affect the primary motor cortex, the insula, the brainstem, or the connecting pathways between them. Brainstem strokes — although less common — tend to cause the most severe dysphagia, because the brainstem houses the swallowing centre and the nuclei of cranial nerves IX (glossopharyngeal) and X (vagus), which are essential for the pharyngeal and oesophageal phases of the swallow. Hemispheric strokes primarily disrupt the oral phase and the voluntary initiation of swallowing.

Warning Signs: How to Recognise Post-Stroke Dysphagia

Coughing or choking during or after eating and drinking is the most recognisable sign, but far from the only one. Watch out for a wet or gurgly voice quality after swallowing liquids, excessive drooling or food falling out of the mouth, a sensation of food sticking in the throat, unexplained recurrent chest infections or fever (a possible sign of silent aspiration), unintentional weight loss, or reluctance to eat due to fear or effort. Silent aspiration — when food or liquid enters the airway without triggering a cough — is particularly dangerous and can only be detected with specialist assessments.

How a Speech Therapist Assesses Post-Stroke Dysphagia

A thorough assessment begins with a detailed clinical history and an evaluation of the orofacial and laryngeal musculature. This is followed by a bedside clinical swallowing evaluation using validated protocols such as the Volume-Viscosity Swallowing Test (V-VST), which tests different textures and volumes in a structured and safe way. When additional information is needed, the speech therapist can coordinate with the medical team to arrange instrumental assessments such as videofluoroscopy or fibreoptic endoscopic evaluation of swallowing (FEES), which allow real-time visualisation of what happens during the swallow. The results guide a personalised rehabilitation plan.

Speech Therapy Treatment: What Does Rehabilitation Involve?

Active Rehabilitation Techniques

Rehabilitation is far more than adapting food textures — it is active, targeted work to restore function. Evidence-based techniques include the Shaker exercise (strengthening the suprahyoid muscles that lift the larynx), compensatory swallowing manoeuvres such as the supraglottic swallow and the Mendelsohn manoeuvre, and lingual strength training using biofeedback devices like the IOPI (Iowa Oral Performance Instrument). Thermal and tactile sensory stimulation is also used to improve the swallowing reflex when it is delayed.

Texture Adaptation Using the IDDSI Framework

While active rehabilitation is underway, it is equally important to ensure that every meal is safe and nutritionally adequate. The speech therapist prescribes appropriate food and liquid textures following the international IDDSI (International Dysphagia Diet Standardisation Initiative) framework, which classifies foods and drinks across 8 standardised levels. This structured approach reduces aspiration risk while preserving as much as possible the pleasure of eating — something that has a direct impact on emotional wellbeing and quality of life.

When to Start Rehabilitation and How Long Does It Take?

The evidence is unambiguous: the earlier intervention begins, the better the outcomes. Ideally, a speech therapy assessment should take place within the first 24 to 48 hours after a stroke, even on the hospital ward. Once at home or in a rehabilitation centre, consistency of treatment is key. The duration varies according to stroke severity and each person's baseline, but many patients achieve significant functional gains within the first 8 to 16 weeks of intensive therapy. Family involvement — learning safe postures, preparing correct textures and reinforcing home exercises — considerably amplifies the results.

Preventing Complications: The Role of Speech Therapy in Patient Safety

Aspiration pneumonia is the most serious complication associated with post-stroke dysphagia and one of the leading causes of mortality in this population. Early speech therapy intervention has been shown to significantly reduce its incidence. Beyond safety, treating dysphagia improves nutritional status, prevents dehydration, reduces hospital readmissions and contributes to a faster overall recovery. This is not just about swallowing — it is about living with dignity and confidence after a stroke.

"Post-stroke dysphagia is not an inevitable, irreversible outcome. With early assessment and specialist speech therapy rehabilitation, many people regain safe swallowing and return to sharing meals with the people they love."

If you or a loved one has had a stroke and is experiencing swallowing difficulties, please don't wait for the problem to worsen. At the practice of Alba Romero Cobos, specialist adult speech therapist in Málaga, we offer a comprehensive dysphagia assessment and build a rehabilitation plan tailored to each individual. Whether you are based in Málaga city or anywhere along the Costa del Sol, you are welcome to get in touch through the contact form on this website or by phone — we would be glad to support you every step of the way.