@melanied, in recent years, microplastics have been found in many parts of the human body, like breast milk, the placenta, testicles, hearts, livers, and kidneys. As you said, you only have to do an internet search to find many articles from trusted, medical sources, like this one:
- Microplastics are inside us all. What does that mean for our health? https://www.aamc.org/news/microplastics-are-inside-us-all-what-does-mean-our-health (Association of American Medical Colleges)

It does sound freaky that they may be poking through your skin. I might suggest by starting by seeing a dermatologist and getting their assessment before presenting your theory. By searching PubMed database using the search term "microplastics health effects" or "microplastics health effects on humans" you will be able to find clinical specialists researching the effect of microplasctics on human health.