Final answer:
To remove a stinger, do not use tweezers as it can inject more venom; instead, use a flat-edged object to smoothly scrape it off to prevent further irritation.
Step-by-step explanation:
When trying to remove a stinger, you should avoid using tweezers or squeezing it, as this can inadvertently squeeze more venom into the skin, leading to increased pain and irritation. The preferred method is to scrape the stinger away using something with a flat edge, such as a credit card or the back of a knife. This technique helps to ensure that the venom sac is not further compressed and more venom is not released into the wound.