Cbd lotion for an achy knee ?

My husband is a big guy he is 6’5 and 280lbs so his knee is constantly aching. It keeps him up at night.

Do you ladies think cbd lotion will help his ache ? He really needs help but we can’t afford to see the doctor right now. It’s his joint in his knee.

I’m wondering if I should splurge and get him cbd lotion from one of the weed shops in town (legal state)?

Thanks ! ❤️