Using a xylometazoline nasal spray daily for more than 3 to 5 consecutive days is not recommended. Long-term use can cause "rebound congestion" (rhinitis medicamentosa), where your nasal passages become chronically swollen, making your congestion worse and leading to dependency on the spray. Other side effects of prolonged use include nasal dryness, burning, irritation, and occasional nosebleeds. To avoid these issues, it is best to limit its use to just a few days. If you need daily relief, please consult your doctor about safer long-term alternatives, such as saline nasal rinses or steroid sprays, which can manage your symptoms safely.