The cream was very good I don’t know if it was dirt or what but the blood part was because of shaving on the tail only it was like thisI wish more vets would explain things with more detail instead of just saying, "It will go away."
When Casper had his bout of megacolon, (acute constipation) our vet took the time to explain what it was and why she thought it was happening. She said that megacolon is "ideopathic" (no proven cause) and that some cats "just get it." She told us things to do to help Casper get better and to help keep it from happening again.
She told us to make sure that Casper gets enough water to drink and to give him more wet food than dry food. She told us to give him Miralax (stool-softening laxative) to keep it from coming back and she prescribed some medicine to help if he has a flare-up.
It only took a five minute conversation to explain Casper's condition and, besides, I had to pay a couple-three hundred dollars in vet bills to help him get better. She darned-WELL better explain the problem for that kind of scratch!
Yes, I also think that the dark spots on your cat happened because its hair was matted and the clumps of hair kept the dirt close to the skin, causing those dark, patchy areas.
The spots of blood might have happened because your cat was trying to pull out the clumps of matted hair using its teeth and hurt its own skin in the process. Sort of like the way dogs will bite themselves when they have flea eggs under their skin.
Don't cats sometimes "flea-bite," too? None of my cats, Casper included, have ever had a flea infestation to speak of. They have always been 100% indoor cats and I always give them a dose of flea medicine in the spring when flea season starts just for safety.
I had one cat, "Jerry," (R.I.P.) that was semi-feral when I first adopted him and he did have some fleas on him but a good flea bath and a dose of flea meds got rid of that.
Anyhow... Do check your cat for fleas and/or ticks. If your cat is an indoor cat it's not likely that there is a flea infestation but it is worth checking.
Even if your live in an apartment like we do, it is STILL possible for fleas to get inside the house. If a neighbor's cat or dog gets fleas it is remotely possible for them to spread through the walls, infesting your cat. (Not likely but still possible.)
After that, just try to keep your cat extra clean and use the medicine that the vet recommends. Keep an eye on the cat to be sure things don't get worse and call the vet if your have any problems.
I am pretty confident that, with proper care, your cat will get better soon.