Bad side effects from sunblock: Who knew?

I think I have discovered sunblock can apparently have bad side effects for me. Or at least one brand of sunblock can apparently have bad side effects for me.

The story: Earlier this month while checking supplies I discovered a spray can of Neutrogena sunblock that I had set aside soon after purchasing it, for reasons I do not recall. I looked for an expiration date and saw that was set for April 2010. Not much time to use an almost full container!

So, I started using it each day on my (shaved) bald head. (Instead of a spray can of Bullfrog brand  sunblock I had been using and which has a later expiration date.) And soon after that I started developing some unusual symptoms:

• Intermittent major stiffness and aches in my legs, and...
• random incidents of minor mental fuzziness (more such incidents than normal!)

I had scheduled a physical exam for late this month, so I was planning on mentioning these symptoms to my doctor at that time. But, it occurred to me early this week that they started at about the same time I began using the Neutrogena sunblock. So, to see if there actually was a correlation the next morning I went back to using the Bullfrog sunblock for the daily application to my head.

And pretty much right away, the symptoms went away. Huh.

I'll try to remember to tell my doctor all this when I see him next week.