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. Alternative names, keywords, and common mis-spellings hay fever, hayfever, allergies