Thanks so much for your helpful reply.
The "bags" you describe sound like mats. What happens is the hair bunches up and pushes the skin out. These are very painful to a cat.
see them here and how to remove video:
Skin tags are little (usually benign) growths.
Read about them here:
I am more concerned about her congestion. She cold have an allergy, upper respiratory infection, cardiac issues, diabetes etc.
Since she is ten and has not been seen in a while, it would be a good idea to do some senior blood work and let the vet see the mats/tags.
here are two Vets that offer a free first visit:
There is a condition where air gets under the skin (usually from a wound or tear) That is why I asked you if she had any procedures.
I hope you will be able to take Sittarra to one of the vets to evaluate her.She does need to be seen ASAP.
Please let me know how she is doing. If you have more questions just press reply and I will be here for you.
Warmest best wishes,