Mate I feel your pain !
I have had exactly the same as you are showing/describing, it's just a bacterial infection, nasty but it clears up.
I had the first "spot" around 2020 on my lower back, where the waistband of my shorts contact my skin. I had been doing some concreting in my garden here in Thailand and an ant or something must have bitten me allowing the infection in, tried squeezing it but nothing would come out of it eventually after 5-6 days it cleared up.
The second time I had them was probably a year or so later, this time in my armpits and the side of my chest, these was definitely from ant bites as I felt them bite while I was gardening, these ones where worse and I had a course of antibiotics to help clear them up, same time frame as the first single spot, 5-6 days to begin to get better.
I could feel that the bites where infected again because of the pain, not the usual bite/spot pain but a deeper sharper stabbing pain.
I treat future bites with alcohol straight away and keep them covered with a plaster/bandaid until they go down, doing this I have not suffered with the large infected spots you show in your pictures since.
The infected nose I put down to the same bacteria entering the area after I plucked some nasal hairs.
Hopefully the your doctor will identify the bacteria and a course of antibiotics will cure you, but you will probably always have an indentation as the infection goes quite deep.