The present discovery pertains generally to the field of therapeutic compounds. More specifically the present discovery pertains to certain di-alkyl-phosphinoyl-alkanes as described herein, DIPA-1-8 and DIPA-1-9, and 2-6 and 2-7 that are collectively referred to herein as “DAPA compounds”, that are useful in the treatment of disorders (e.g., diseases) including: sensory discomfort (e.g., caused by inflammation, irritation, itch, or pain) in the nasal cavity. The applicant has found that localized delivery of DAPA compounds with a swab to the Kiesselbach's area of the human nose will relieve the discomforts of rhinitis and other nasal cavity discomforts.