Ageism in the Workplace

Hello everyone

I used to be a member of this forum a while back but i haven't been around for a while.

I have a bit of pickle here at work. I have recently joined this mid sized company as a manager / department head (although its the smallest department but not any less important). I am fairly young in comparison to the other managers here. Also, I'm female and my company is fairly male dominated.

I have a problem with one of the managers. Also a woman, she is quite a lot older than me but not any more senior than I. And its difficult. I find this manager is always rude to me and quite demanding. She runs a larger department but she is always very short and sometimes condescending to me, however she hasn't said anything directly to me re ageism in any form... And in the morning meetings we have she is always looking down her nose at me. I am not sure if i should approach her about this as it isn't direct, just a feeling, attitude i get from her...

What should i do?

Thanks for your help.