I'm sorry to hear your child is feeling unwell with a severe sore throat, blocked nose, and fever. Managing these symptoms carefully is important.

Regarding Nosikind-0.1% Nasal Spray:

• This spray contains xylometazoline, a decongestant that helps relieve nasal blockage by narrowing blood vessels in the nose.
• It is generally not recommended for children under 12 years old, so please confirm with your child's doctor before continuing its use.
• Use it exactly as prescribed, and avoid prolonged use beyond the recommended duration to prevent rebound congestion.

Additional steps to relieve your child's symptoms:

• Fever and sore throat: Use age-appropriate fever reducers like paracetamol (acetaminophen) after consulting your pediatrician.
• Hydration: Encourage plenty of fluids such as warm water, herbal teas, or soups to soothe the throat and prevent dehydration.
• Humidify air: Use a humidifier or place a bowl of water near a heat source to keep the air moist, which can ease nasal congestion and throat irritation.
• Rest: Ensure your child gets adequate rest to support recovery.
• Saline nasal drops: These can be gentle alternatives to help clear nasal passages safely in children.

If symptoms worsen, persist beyond a few days, or if your child has difficulty breathing, swallowing, or shows signs of dehydration, please seek immediate care from a pediatrician.

Recommendation: Consult a pediatrician promptly to review your child's condition and the use of Nosikind nasal spray, and to get tailored treatment advice.To narrow down potential causes, we will need some more information.Please tell me the age and gender.