House dust mites are associated with allergic rhinitis and asthma,[13] as well as allergic conjunctivitis.[14] Efforts to remove these mites from the environment have not been found to be effective.[13] Immunotherapy may be useful in those affected.[13] Subcutaneous injections have better evidence than under the tongue dosing.[15] Topical steroids as nasal spray or inhalation may be used.[16]