Yes, patients can cough up or blow worms out of their nose, though this is uncommon and depends on the specific parasitic infection.
Certain helminth larvae can be expelled through coughing or nasal discharge during their pulmonary migration phase, particularly with Ascaris, hookworm, and Strongyloides infections.
When This Occurs
Loeffler's Syndrome (Larval Migration Through Lungs)
During acute helminth infection, larvae migrate through the lungs 1-2 weeks after initial infection. Larvae may be seen in sputum (though rare) or bronchoalveolar lavage 1. This occurs most commonly with:
- Ascaris lumbricoides
- Hookworm species
- Strongyloides species
Patients present with fever, urticaria, wheeze, dry cough, and rarely hemoptysis during this migration phase 1. The larvae can be coughed up and either expectorated or swallowed 2.
Nasal Expulsion of Parasites
Actual worms emerging from the nose is extremely rare but documented in specific circumstances:
- Enterobius vermicularis (pinworm) has been reported in the nasal cavity, presenting with crawling sensation in the nose 3
- Fly larvae (myiasis) can emerge from the nasal cavity in unconscious or debilitated patients - these are maggots, not helminths 4, 5
Clinical Significance
Strongyloidiasis - Critical Warning
If strongyloidiasis is suspected, urgent diagnosis and treatment are imperative 1. Hyperinfection presents with respiratory symptoms including cough and breathlessness. Caution: steroids may cause hyperinfection in strongyloidiasis 1.
Diagnostic Approach
When larvae migration is suspected:
- Examine sputum or respiratory secretions for larvae
- Check for peripheral blood eosinophilia
- Look for migratory pulmonary infiltrates on chest radiograph
- Consider bronchoalveolar lavage if diagnosis unclear 1
Treatment Algorithm
If no organism identified but Loeffler's syndrome suspected, treat empirically with:
- Ivermectin 200 μg/kg single dose PLUS
- Albendazole 400 mg single dose
- Retreat 1 month after resolution of pulmonary symptoms to ensure adult worms are treated 1
Common Pitfall
The most important caveat: visible worms being coughed up or blown from the nose represents active larval migration or ectopic infection requiring immediate antiparasitic treatment - this is not a normal finding and indicates significant parasitic burden requiring intervention.