Can Agastache relieve nasal congestion?
Generally, Agastache (Huoxiang) may help relieve mild nasal congestion caused by dampness obstructing the nasal passages. However, it is less effective for severe nasal congestion caused by wind-cold or wind-heat. If in doubt, it is advisable to seek medical advice in advance. Detailed explanation is as follows:

If nasal congestion is due to dampness accumulating in the nasal passages, characterized by thick nasal discharge and intermittent nasal blockage, Agastache's aromatic property to resolve dampness can help clear the nasal passages and reduce mucosal swelling, thereby relieving the discomfort of nasal congestion.
If nasal congestion is caused by severe nasal mucosal congestion due to wind-cold common cold, or nasal dryness and swelling caused by wind-heat, Agastache's medicinal properties may not effectively target the underlying causes. In such cases, it may fail to relieve nasal congestion effectively and could even delay appropriate treatment.
When using Agastache to relieve nasal congestion, it can be decocted and used for nasal steam inhalation. If nasal congestion does not improve after trying this method, or if symptoms such as headache or fever occur, timely alternative measures should be taken. When necessary, seek medical attention to determine the exact cause before further management.