If it is due to cough, then do steam with hot bag. Always keep body warm. Avoid cold things, fruits and even excess amount of water which increases Kaph Dosh.
Next Steps
Do Nasya treatment from a doctor specialised Ayurvedic Panchakarma.
Health Tips
According to Ayurveda, this is the period when Kaph Dosha starts accumulating in our body .So, avoid things which increases it.