Swelling and inflammation: Allergies can cause swelling and inflammation in the nose, throat, and sinuses. This can make it difficult to breathe and produce a clear tone.
Nasal congestion: Nasal congestion can also affect the singing voice by blocking the airflow through the nose. This can make it difficult to produce a resonant tone.
Post-nasal drip: Post-nasal drip can cause irritation in the throat and make it difficult to maintain a steady pitch.
Coughing and sneezing: Coughing and sneezing can disrupt the flow of air and make it difficult to sing.
Fatigue: Allergies can also cause fatigue, which can affect a singer's overall performance.
Medication side effects: Some allergy medications can cause side effects such as dry mouth or drowsiness, which can also affect the singing voice.
If you have allergies and you are a singer, it is important to see an allergist to get your symptoms under control. You may also need to make some adjustments to your singing technique to accommodate your allergies. For example, you may need to sing in a lower key, use less vocal projection, or take breaks more frequently.