Hello, my name is Dr.Dorina Gurabardhi. I understand your concern.
The symptoms seems to be related to an upper
respiratory tract infection.
Some advices that I can give to you are
1)Use nasal washes.
Use saline nose spray or drops to loosen up dried mucus, followed by blowing or suctioning the nose. If these are not available, warm water will work fine.
2)Instill 2 to 3 drops in each
nostril. Do one side at a time. Then suction or blow.
3)Give warm, clear fluids (eg, warm water, apple juice). Dosage is 5 to 15 mL 4 times per day when coughing.
4)Fluids: Help your child drink plenty of fluids. Staying well hydrated thins the body’s secretions, making it easier to cough and blow the nose.
5)Humidity: If the air in your home is dry, use a humidifier. Moist air keeps nasal mucus from drying up and lubricates the airway.
Hope my answer was helpful, if you have any other questions I'll be glad to help, thanks!