Possibly world’s first customer service complaint, nearly 4,000 years old.

Facial Capillaries.

Tattooing on penis caused permanent erection in a 21-year old Iranian man. Doctors tried to fix it using various procedures but failed and eventually the man decided not to pursue any more corrective measures and continues to live with the condition. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1743-6109.2011.02579.x