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Why I can’t always wear a mask

It’s frustrating and annoying

Shefali O'Hara
3 min readDec 22, 2021
Photo by National Cancer Institute on Unsplash

I have metastatic lung cancer.

I was diagnosed in May, thanks to a lemon-sized brain tumor that immobilized my right leg. When they did a scan on me they also discovered the cancer in my lungs as well as a spot in my liver.

Thanks to surgery, the brain tumor is gone and I’m walking again.

Because of the lung cancer, I monitor my O2 stats twice a day. I record the numbers in a spreadsheet. Despite the lung cancer and my asthma, I’ve been keeping my O2 levels at a respectable 95%-97% for the last few months. This is in the normal range and is a good sign that I’m keeping the cancer at bay.

Recently, I had pneumonia and despite using nebulizers and medications, my stats hovered between 92%-94% for several days. This level is low enough to be of concern, though not bad enough to send me to the emergency room.

However, when I wear a mask properly… After 20 minutes, I feel faint, and my O2 levels drop to dangerous levels. Last time I tested this at home, they got down to 88%. That is enough to merit a trip to the emergency room.

Fortunately, taking my mask off and doing deep breathing exercises restored my levels to a healthy range.

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Shefali O'Hara
Shefali O'Hara

Written by Shefali O'Hara

Cancer survivor, Christian, writer, engineer. BSEE from MIT, MSEE, and MA in history. Love nature, animals, books, art, and interesting discussions.

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