I think my IIH started from steroid injections. But you asked about low pressure headaches and that would be high pressure headaches. I truly believe mine is secondary to this. It saddens me to think this is the cause, but I didn't have any problems until I started having injections. My neurologist said this is possible too. If this or anything else about my treatment or story would be helpful I would be happy to share it all. Thank you, Brandi