No. Shaving won't make pubic hair thicker. But still, lots of people think shaving changes thickness of hair—and there's a reason for it.
Hair in its natural state has a tapered or beveled edge, think like the tip of a sword. Once hair is cut, the edge is blunted. Think of how your grass looks freshly mowed on your lawn. That is now your hair. When the hair grows back above the skin’s surface, not only does it feel stiffer than before, it looks thicker too. While the actual thickness hasn't changed, the thought that hair becomes thicker after shaving has for this reason turned into a common old wives tale.
But it won't stay that way. As hair continues to grow, it will soften a bit as it gains some length and can lay down flat. Also, hair goes through cycles of growing, resting and shedding. The hair that has been shaved will eventually fall out in the shedding stage. Just how long it takes for all the hair to shed is impossible to predict, because it depends on plenty of factors, including gender, age, season, and hormone levels. However, the new hair that grows will come back in its natural state, with a tapered edge.
Stiff, blunt hair is particularly common with pubic hair. Since pubic hair is generally thick to begin with, it can feel stiffer than other body parts that have also been shaved. In contrast, fine facial hair may feel a little differently after being shaved, but not much. Thick hair in other places of the face or body can react similarly to pubic hair in the sense they look thicker than before. This includes men's facial, back and chest hair.
The thickness is why it's so easy to get ingrown hairs when you shave your pubic hair. The blunt edge created from shaving not only makes hair appear thicker, but also creates the right breeding grounds and circumstances for the hair to break into the skin and produce ingrown hair or razor bumps. For best results, teach yourself how to do a close, safe shave while avoiding common side effects of the razor.
You should also know that you're not stuck with just shaving. There are other hair removal methods like waxing, sugaring or using epilators that can also remove pubic hair safely. These options uplift the entire hair from the follicle when performed properly, which lasts longer. If you're removing most or all of the pubic hair, then getting a professional bikini wax or sugaring can be a good idea. Many people like these options because they provide longer lasting results. In addition, because there isn't hair right under the skin, there's no shadow like is often left with shaving.
Another benefit is that when hair grows back, it will have its natural shape—a tapered or beveled edge.