Hay fever - No. 27 To purchase Hay fever - No. 27 and other homeopathic remedies online, please click the button above. Roof of mouth itchy, watery eyes, nasal discharge, loss of smell, taste, difficult breathing. Hay fever - No. 27 is available to buy through our online shop from WHP in USA, by clicking the red 'View Purchase Options' button.. Adding this remedy to your basket will empty all other items, as all items have to be from one supplier. Alternative names, keywords, and common mis-spellings hay fever, hayfever, allergies