Question: what to do when you have a severe cold?
Answer: Stay hydrated. Water, juice, clear broth or warm lemon water with honey helps loosen congestion and prevents dehydration. ... 
Rest. Your body needs rest to heal.
Soothe a sore throat. ... 
Combat stuffiness. ... 
Relieve pain. ... 
Sip warm liquids. ... 
Try honey. ... 
Add moisture to the air.