Aging: How Itch Tells Us the Story Behind Aging and Provides a Path Forward

Conclusions

• Aging is closely associated with an increase in itch incidence, particularly starting around the age of 40.
• Itch is a complex symptom that reflects changes in immunological, neuropathic, microbiome, and skin barrier factors in older adults.
• Epidemiological evidence indicates that as the population ages, the prevalence of itch-related visits to healthcare providers is increasing globally.
• Historical references dating back thousands of years indicate that the phenomenon of aging-related itch has been recognized for a long time.
• Modern understanding shows that factors such as senescent cells, immune senescence, and inflammation contribute significantly to chronic itch in older adults.
• Effective treatment for itch in older adults should consider the multifaceted nature of the condition, addressing both immunological and neuropathic pathways.
• Topical therapies and medications that have dual immunomodulatory and neuromodulatory effects, such as calcineurin inhibitors and JAK inhibitors, may be particularly beneficial.
• Safety and tolerance are critical considerations when selecting treatments for itch in the elderly population.
• The concept of senomorphic therapies may offer future avenues for addressing aging and itch by modifying senescent cell behavior.
• Aging complicates the understanding and treatment of itch, requiring tailored strategies that recognize individual variations in susceptibility and symptom manifestation.