
What Causes Dizziness, Occasional Mild Nausea And Slight Nasal Congestion?

You are mostly having infective exacerbation of asthma.
Detailed Answer:
Thanks for your question on Health Care Magic.
I can understand your concern.
By your history and description, possibility of infection and worsening of underlying asthma is more.
Infection is the most common cause for worsening of asthma (exacerbation).
Infection also causes hypotension. And this can cause giddiness, dizziness.
So in my opinion, you should consult pulmonologist and get done
1. Clinical examination of respiratory system
2. PFT (Pulmonary Function Test)
3. Chest x ray.
Chest x ray is needed to rule infection. PFT is needed to know the severity of asthma. Treatment of asthma is based on severity only. So you may need antibiotics, additional inhaled bronchodilators and inhaled corticosteroid (ICS).
Oral combination of antihistamine and anti allergic drugs are also beneficial.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.

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