Peppermint can be beneficial for sinus care. Inhaling diffused peppermint oil can oftentimes immediately unclog your sinuses and offer relief for scratchy throats. Peppermint oil also acts as an expectorant and decongestant. Rubbing Peppermint oil on your chest when you have a cold can help clear nasal congestion and relieve your cough and other cold symptoms. It may also provide beneficial results for sinusitis, asthma, and bronchitis.