After examining Otzi's bones scientists were able to discover degeneration. This was in the form of osteoathritis and parasites most likely brought on by age, stress or hard-work!
He had 57 tattoos, which seem to be used as an early type of acupuncture. It has been speculated that these tattoos may have been related to pain relief treatments. If so, this is at least 2000 years before their previously known earliest use in China (c. 1000 BC)

Tattoos include: vertical lines to both sides of the lower back, a cruciform mark behind the right knee, and various marks around both ankles.
Ötzi had several carbon tattoos including groups of short, parallel, vertical lines