A systematic review of 2,168 studies that looked into the adverse effects of wearing masks during the COVID-19 pandemic has found that the practice led to negative health consequences, including itching, headaches, and restriction of oxygen.
“We found significant effects in both medical surgical and N95 masks, with a greater impact of the second,” said the review, published in the “Frontiers in Public Health” on April 5. A meta-analysis of multiple studies found that headache was the “most frequent symptom” among mask wearers, with a prevalence of 62 percent for general mask use and up to 70 percent when using N95 masks. Shortness of breath was observed at 33 percent for general mask use and 37 percent among N95 users….