I wonder if this treatment can also improve size?
Based on my experience, I would say no. I am using a testosterone gel to boost T, which I have been applying since last August. I always rub a little on my shaft and behind my balls and then apply the DMSO/I solution. I have read that TRT can sometimes induce additional growth if you suffered secondary hypogonadism during puberty (low T). So far no discernable growth.
However, the wart like growth on my wrist has almost completely disappeared since I started applying the DMSO/I solution. I hope it doesn’t have the same effect on my dick.