Based on the search results， here are three things that those born in the Year of the Snake should avoid wearing:

Pig-shaped accessories: Since the snake represents Si fire (巳火) and the pig represents Hai water (亥水)， these two are in conflict because water and fire are incompatible. Wearing pig-shaped accessories may create an unfavorable atmosphere.

Silver jewelry: Silver items have strong Yin properties， which can transmit negative energy to those born in the Year of the Snake， leading to negative and passive emotions and potential difficulties.

Pink crystal: Wearing pink crystal may attract unwanted romantic interests and increase instability in relationships. For those in business， it can lead to entanglement in scandalous affairs. Those who are married may find it hard to resist temptation， potentially leading to betrayal.

Additionally， some sources suggest avoiding 朱砂 (cinnabar)， as those born in the Year of the Snake are already associated with the fire element， and wearing cinnabar may lead to financial losses. Some people believe those with the Chinese zodiac signs of Pig， Tiger， and those who are weak should not wear snake accessories.