Can I have 2-3 sessions of Laser Hair Removal on my arms to reduce hair density?

You have asked in excellent question about how much here reduction you might achieve wit a single treatment.  Unfortunately there is no reliable way to predict exactly how much they hair quantity will be reduced or the density of hair will be reduced following a single treatment.  Multiple treatments are usually required to achieve best outcomes but if your goal is only to lighten the amount of hair growth, it is not possible to achieve this and a scientific manner.  Best of luck!

Thank you for your question. It is not possible to determine which hairs will be effected with each laser treatment. You can reduce hair density with laser hair treatments however you may end up with a patchy look if you do not complete the sessions. Speak with your technician to see what they recommend for you to achieve the results you are looking for. Best Wishes,Pablo Prichard

There isn't a good way to determine which hairs will be effected and which won't. So many times people who try to just "lessen" hairs with laser hair removal will end up with a very patchy, uneven look. I really wouldn't suggest this...."This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."