The present discovery pertains generally to the field of therapeutic compounds. More specifically the present discovery pertains to certain di-isopropyl-phosphinoyl-alkanes as described herein, DIPA-1-7, DIPA-1-8, and DIPA-1-9, collectively referred to herein as “DIPA compounds”, that are useful, for example, in the treatment of the discomforts of dermatological disorders (e.g., diseases) The treatment is for the dysesthesia (e.g., caused by irritation, itch, or pain) due to dermatitis, urticaria; scalp itch; vulvar itch; lichen sclerosus; cholestatic itch; psoriasis; sebhorrheic dermatitis; allergic conjunctivitis; blepharitis; and pruritus of the elderly. The applicant has found that topical delivery of DIPA compounds to the skin alleviates the dysesthesia of these conditions in human subjects. The present discovery pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, for example, in the treatment of the dysesthesia of these dermatological disorders.