Thanks for posting your query.
With the available described symptoms, there appears to be possibility of Carcinoid
Presence of cough along with facial redness
suggests the diagnosis.
It is caused by endogenous secretion of mainly serotonin and kallikrein which causes bronchoconstriction
and persisting cough.
You should consult with internal medicine specialist and should go for thorough check up.
You should go for 24 hour urine levels of 5-HIAA (5-hydroxyindoleacetic acid), the end product of serotonin metabolism
You should also go for chest x ray and ECG on preliminary basis.
Treatment depends on the diagnosed disease.
Dr. Mayank Bhargava