These answers are for informational purposes and do not replace a physician head-to-head visit. A patient-physician relationship is not established.
These are most likely cherry angiomas, also known as Cambell D Morgan spots. IO don't like the phrase senile angiomas, especially as I have gotten older and developed them myself.
These are extremely common, benign growths of blood vessels. They are especially common in fair-skinned people.
They can be brought on by birth control pills ( obviously not a factor with your husband), the sun, and liver problems. Some authorities have implicated an excess of progesterone. However, the vast majority appear for no known reason.
There is no medical need to treat them, but if they are cosmetically bothersome, he can see a physician for treatment with a pulsed dye laser.
While there are occasional reports of patient having an underlying malignancy, and developing a sudden shower of cherry angiomas, they are regarded as a benign nuisance.
There really is not means of preventing new ones. I can see no harm, however, in taking Vitamin C 500 mg. twice a day and Ruten. Both these hold up the collagen surrounding blood vessels.
I would be happy to answer further questions if you would like.