i bought this for myself because i get intense headaches but my fiance got sick this weekend so it was the perfect opportunity to see if this works for sinus headaches- you can heat it up in the microwave for 45 seconds. you can also use it cold, and only needs to be in the freezer for 1-2 hours #sinusrelief #headachecap #tiktokshopblackfriday #tiktokshopcybermonday #tiktokshopholidayhaul