HHS-OASH-2026-0397-4831 https://www.regulations.gov/comment/HHS-OASH-2026-0397-4831 Good afternoon, I am a 33-year-old woman. In 2025, when 5G internet (as well as 5 GHz Wi-Fi) was introduced in my house, I started experiencing headaches on the very same day. Whenever I went outside, away from Wi-Fi, the headache would disappear after a while. As soon as I returned home, it would come back. Around three days after 5G was introduced, I also started experiencing a pulsing sensation in my ears, a symptom I had never experienced before in my life. I also own an apartment where I have to spend several days every week due to work. When my neighbours in the adjoining apartments started getting 5G, I found that I physically could not stay in my apartment for long periods of time. My headaches became persistent and no longer went away easily, even when I was away from Wi-Fi. Over the following months, I also began experiencing regular episodes of tachycardia accompanied by elevated blood pressure, despite never having had any problems with my blood pressure before. I underwent a brain MRI because of my headaches, and some spots were found on my brain. My neurologist told me that, in my case, these spots indicate changes in blood circulation in the brain. On several occasions, I had to stay in a room with an active 5G modem. Each time, the result was a severe headache and dizziness so intense that I felt nauseated, all within less than an hour. I simply had to leave the room and go outside because I physically could not remain there. This summer, I had a three-week holiday that I spent in nature, with almost no internet access. During that time, my headaches disappeared completely. However, as soon as I returned to work and resumed travelling to my apartment, all the symptoms quickly returned. At present, I continue to experience dizziness and frequent headaches, and I have been dealing with tachycardia throughout the autumn. I will leave you my email address in case you have any advice on what could be done to address this problem. I would be extremely grateful for any suggestions. I understand that I need to reduce my exposure to 5G, but this is quite difficult in my situation. Are there any tests that could help identify the underlying cause of this sensitivity? Thank you very much for your time and help.