Need advice on new/maintenance session arms

Thanks for the answer. I’m 38 yrs old. Unfortunately, I can’t submit any pics. I’m talking about lower arms and the hair is coarse, dark and fairly dense, especially in the area I would like to treat, from the middle of the lower arm towards the exterior and all the way around the wrist. In the interior part hair is quite sparse. I’m afraid of doing too much, so I am wondering if a single laser treatment only in the part where hair is growing will be enough. Or maybe two within two months?