Pest/Disease ID

Can anybody help me ID this problem with my swiss mint plant?
There are lots of tiny blobs, almost like blisters or maybe egg sacks. I can't find any bugs but they might be hiding from me.
The plant arrived with a couple of leaves like this, which i cut off, but i came back about a week later and the problem had spread.
I have attached a picture but it is not a great attempt. It is the best i can do, sorry.

Any ideas?

After some research i have come to the conclusion that this is likely early stages of mint rust.
From what i read if you let it get too far it can spread around your garden like crazy. To be safe i have thrown away the plant, soil and pot, double bagged.
I have 10-15 types of mint in my garden so i don't want to risk keeping it around.

I did take 2 small cuttings from tips that were not showing any signs (yet), which i am attempting to root in water. Fingers crossed they are okay. As soon as i see any signs of rust i will throw them out too.

I will leave this here in case it can help somebody else in the future.

Thanks Noah for sharing! The spots do look like bacterial or fungal infections. Do you recall any unusual weather before the spots showed up, like heavy rain immediately followed by sunny days? That is the recipe for fungal outbreak and sometimes sudden death in my plants. Top dressing with compost and building up healthy soil help keeping pathogens in check. Mints root very easily so you will get the plant growing back just fine.

May Lotito wrote:Thanks Noah for sharing! The spots do look like bacterial or fungal infections. Do you recall any unusual weather before the spots showed up, like heavy rain immediately followed by sunny days? That is the recipe for fungal outbreak and sometimes sudden death in my plants. Top dressing with compost and building up healthy soil help keeping pathogens in check. Mints root very easily so you will get the plant growing back just fine.

The plant came to me with a few leaves already like this, so i don't know what the weather was like where it came from. I did cut off the leaves that were infected but it still spread. While i had the plant it was indoors. It had one good water when it was potted then it was left with no water. I did not water the leaves, of course, just the soil. It was maybe a week or so in the window and the plant was half covered in the same blobs. It seemed to move up the plant, but maybe it was just because the infection started at the bottom.
Luckily it doesn't look like it spread to any of the other plants in the window, and the two cuttings so far look like they are clean too. I will be watching them closely!

This was a freebie so no big deal if it dies.
I just realised i called it spanish mint in the original post. It is swiss mint. Not sure why i said spanish hopefully i can edit that and correct it now.

That looks similar to galls to me.

The cuttings i took have rooted nicely in water and yesterday i potted them into small starter pots in coir. So far they look 100% perfect with no sign of problems.
It was a drastic solution but it seems to have potentially saved me from the problem spreading to other crops.