I had problems with ingrown hairs. Since I changed to using DE and SE razors, I think I've had three in the last four years, all from worn blades.
What I found was, as a blade wears it doesnt cut as well and starts to tug. That tugging pulls the hair from beneath the skin, partially cuts it and then it breaks leaving a jagged edge below skin level like below.
Where a fresh blade will cleanly cut.
A worn blade or a weakly supported blade can compound that problem, it did for me. If a blade can flex as it cuts, it can also tug the hair and break it as its partially cut. Add a worn blade into the mix and the problem becomes worse quickly. Increasing blade rigidity, such as a design like Fatip, minimizes, if not totally removes, that blade flex.
An example of my experience with that is in the thread below.
Gillette NEW LC Not Cutting It - https://www.badgerandblade.com/forum/threads/gillette-new-lc-not-cutting-it.520246/
I was using a Gillette New LC, which has middle of the road blade support. It would skip right over my trouble areas and if I was to push things even a little, it would have given me ingrown hairs. Increasing the rigidity with a shim helped about 50%. Changing to a more rigid design, a Gillette New SC, solved my issue completely. From that, I learned I needed a rigid design. I moved to a Fatip Grande and never looked back. It outperforms my R41, with the same blades, by a staggering amount.
Fast forward four years however and, if I was to use the same Gillette New LC with a fresh Feather blade, I'm quite sure I could minimize that issue almost completely only with my more evolved technique.
It takes time to develop an understanding of all aspects of 'this thing of ours' but, once you do, the best shaves of your life will become a reality. Take the time to learn and understand any shortcomings in each aspect. Prep, soap, razor, blade, angle, pressure and direction of shave regarding growth, all need to work together. When you identify one aspect that needs improving, work to fix it.
I can highly recommend a search of the word "Rigidity". There is much to read.
I am going to guess that you are suffering from hair breakage.
What I found was, as a blade wears it doesnt cut as well and starts to tug. That tugging pulls the hair from beneath the skin, partially cuts it and then it breaks leaving a jagged edge below skin level like below.
Where a fresh blade will cleanly cut.
A worn blade or a weakly supported blade can compound that problem, it did for me. If a blade can flex as it cuts, it can also tug the hair and break it as its partially cut. Add a worn blade into the mix and the problem becomes worse quickly. Increasing blade rigidity, such as a design like Fatip, minimizes, if not totally removes, that blade flex.
An example of my experience with that is in the thread below.
Gillette NEW LC Not Cutting It - https://www.badgerandblade.com/forum/threads/gillette-new-lc-not-cutting-it.520246/
I was using a Gillette New LC, which has middle of the road blade support. It would skip right over my trouble areas and if I was to push things even a little, it would have given me ingrown hairs. Increasing the rigidity with a shim helped about 50%. Changing to a more rigid design, a Gillette New SC, solved my issue completely. From that, I learned I needed a rigid design. I moved to a Fatip Grande and never looked back. It outperforms my R41, with the same blades, by a staggering amount.
Fast forward four years however and, if I was to use the same Gillette New LC with a fresh Feather blade, I'm quite sure I could minimize that issue almost completely only with my more evolved technique.
It takes time to develop an understanding of all aspects of 'this thing of ours' but, once you do, the best shaves of your life will become a reality. Take the time to learn and understand any shortcomings in each aspect. Prep, soap, razor, blade, angle, pressure and direction of shave regarding growth, all need to work together. When you identify one aspect that needs improving, work to fix it.
I can highly recommend a search of the word "Rigidity". There is much to read.