The present invention provides diisopropylphosphonoalkanes as topical agents for the treatment of sensory discomfort. The present invention relates generally to the field of therapeutic compounds. More specifically, the present invention relates to certain diisopropylphosphonoalkanes as described herein: DIPA-1-5, DIPA-1-6, DIPA-1-7, DIPA-1-8, and DIPA-1-9, which are collectively referred to herein as' DIPA compounds', as well as to the use of diisopropylphosphonoalkanes, such as diisopropylphosphonoalkanes, such as diisopropylphosphonoalkanes, such as diisopropylphosphonoalkanes. These diisopropylphosphono alkanes are useful, for example, in the treatment of disorders including sensory discomfort, skin retardation, dermatitis, ocular pain and discomfort, thermal discomfort, thermal stress, redness and / or night sweat, post-operative hypothermia, post-anesthesia shivering, fatigue, exhaustion, depression, cognitive dysfunction, and are useful for enhancing cognitive function.