A general practitioner has provided explanations for two complex medical concerns: painless visual disturbances and chronic coughing that has resisted standard treatments.

In one case, a woman from Sandown, Isle of Wight, reported experiencing brief episodes of sparkling or flashing lights in both eyes lasting around 15 minutes. These occurrences began nearly two years ago and have happened three times since. Despite a clear CT brain scan, she remains concerned about the underlying cause.

The GP identified these symptoms as typical of migraine aura, a temporary visual disturbance often preceding or accompanying migraines. When such visual events occur without the accompanying headache, the condition is referred to as silent migraine or acephalgic migraine. Because the episodes tend to resolve quickly, no medication can be administered during the event itself. The recommended approach is to rest quietly until the symptoms subside.

To reduce the frequency of these episodes, preventive medications may be considered if attacks become frequent—at least weekly. Options include the beta-blocker propranolol, which lowers neuronal excitability, as well as anticonvulsants like topiramate and certain antidepressants such as amitriptyline, which help stabilize overactive nerves linked to migraine onset. However, the GP advised against preventative drugs unless the symptoms worsen, due to potential side effects.

To help confirm the diagnosis of silent migraine, the patient is advised that during the next episode, covering each eye separately could be informative. If the visual disturbance persists regardless of which eye is covered, it indicates the phenomenon originates in the brain, consistent with migraine aura. If it disappears when one eye is covered, further ocular and vascular assessments would be necessary, as that could point to other issues with the eyes or blood flow. Common migraine triggers include stress, sleep deprivation, missed meals, or dehydration.

In a second case from Whitby, North Yorkshire, a man described a persistent cough lasting over three years, despite clear chest X-rays and CT scans and multiple unsuccessful treatments. His symptoms partially improved with nasal antihistamines (azelastine) and asthma inhalers but fully resolved only after courses of antibiotics, which provided temporary relief.

The GP suggested that the prolonged cough might be caused by a persistent bacterial lung infection complicated by the man’s use of the steroid prednisone for vasculitis—a condition where blood vessels become inflamed and narrow. Prednisone suppresses the immune system, potentially allowing infections to persist or worsen. There is also a possibility of bronchiectasis—a chronic lung condition resulting from repeated infections—that might have been missed on initial imaging.

Further diagnostic steps may include a high-resolution CT scan and the collection of sputum samples to identify bacteria or fungal infections, particularly since steroid inhalers can increase fungal risk. Additionally, vasculitis itself might be affecting the lungs or airways, contributing to the cough.

Given the complexity of the chronic lung condition, the GP recommended consultation with a respiratory specialist if the patient is not already under such care, or a referral through a general practitioner.

Both cases underscore the importance of thorough clinical evaluation and tailored approaches to managing persistent or unusual symptoms.