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I work as a Graphic Designer for a company, so spend a lot of time sitting down at a desk. For the past two years, I have suffered from disabling migraines and a 24/7 tension headache. My physiotherapist has concluded that my chair is causing the problem. The chair really kills my back, which causes my neck to stiffen up, which then leads to my headache.
I have asked HR numerous times over the past 6 months if I can have my workstation assessed, but she has declined. I have asked them if they can buy me a new chair, but they think there's nothing wrong with my chair as it's ok for everyone else.
I tried a medical chair and noticed a huge improvement. I have since bought one and it's now at my home. I have asked HR about bringing in my own chair, but she asked me to speak to my line manager. The line manager was reluctant to allow this, and said he would speak to the owners. I haven't heard from him for about a week now.
The chair that can help me end the pain is at home, but my employer doesn't seem to happy to let me use it at work. What should I do in this situation?