It sounds like your symptoms of severe cold, nose irritation, and frequent sneezing after washing your head are likely related to nasal allergies, which can be triggered by changes in temperature or moisture.

🩺 What You Can Do Now

• Avoid exposure to cold water or sudden temperature changes on your head if possible, as this may trigger your symptoms.
• Keep your living environment free from dust and allergens, and avoid smoking or strong irritants.
• Consider using a prescribed nasal spray like Allegra Nasal Spray, which helps reduce nasal allergy symptoms by decreasing inflammation. This should only be used under a doctor's guidance.

⚠️ When to See a Doctor

• If symptoms worsen or do not improve with initial measures.
• If you experience nasal pain, bleeding, or persistent dryness.
• If you have a history of nasal surgery or infections.

🩺 Follow-Up

Consult an ear, nose, and throat (ENT) specialist for a thorough evaluation and personalized treatment plan, including allergy testing if needed. They can prescribe appropriate medications and advise on preventive steps tailored to your condition.To narrow down potential causes, we will need some more information.I understand you're dealing with severe cold, nose irritation, frequent sneezing after washing your head, and frequent nasal allergies. To help me understand better, could you please tell me your age and gender?