I have cough with itchy throut for 1 month I tried...

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Cough usually resolves within 2-3 weeks, but sometimes it takes longer time after viral infection, or it could be due to a problem.

What are the causes of cough with itchy throat?

1. Allergy to food or drug
2. Allergic rhinitis
3. Infection
4. Post-nasal drip
5. GERD (gastroesophageal reflux disease)
6. Dehydration

How to prevent and treat?

1. Cough syrup
2. Antihistamines like Allerfin 1 tablet before sleep
3. Nasal spray like Vibrocil
4. Drink alot of water to keep your pharynx moist
5. Drink honey with ginger and lemon
6. Gargle with salt water
7. Avoid food and drinks that cause allergy
8. Herbal drinks

When to see a doctor?

1. Fever
2. Difficulty swallowing
3. Difficulty breathing
4. Swelling 

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Kind Regards