When i massage Minoxidil into my temples, my hair starts to fall out. Is this normal? Will the hair grow back?

Minoxidil usually helps the hair growth and if you stop using it the hair that grew because if minoxidil can shed. It Is better if you get a consultation and add photos. 

The massaging of any liquid including water itself can remove hairs temporarily. Generally these are telogen hairs meaning hairs that were destined to come out anyways. To determine if it is a minoxidil specific effect one can try massaging both water one day and minoxidil the next day and see if the hair loss is specifically related to the minoxidil. Any liquid massaged on the scalp can remove hairs that were destined to come out.

Massage of hair that is in miniaturization will be sensitive to massage and can be mechanically pulled out