Hello My Dear Friend!
Well, I have to say that I don’t usually see a problem on the underside of the mid tail region. Typically tail issues occur at the base where fleas like to hang out. In these cases I ask clients to use a flea comb to look for evidence of fleas. The little black specks that resemble pepper, or a live flea in the comb is proof that fleas are present. Which is an easy fix these days with all of the safe efficacious products available.
But, this is not your case.
I would question a few things:
1. Most likely a wound? Is she chewing/licking due to trauma here. This is most easily ruled out by an exam of the lesion. Is there any signs of a puncture? Scratch? Abrasion? Even if I cannot convince myself that I think it is a wound I will treat for the most likely scenario anyway by placing an e-collar and providing either a topical (probably the best choice here because the tail has poor blood supply and a systemic antibiotic may take a longer time to get there) and it looks like it is trying to heal already. I would use a topical antibiotic cream. As long as it is not ingested most of the human equivalents are fine. I would leave the collar on for at least a week. If the hair is growing back and the site is improving this treatment plan is proof of our suspicion.
2. If the lesion persists I would consider ringworm a possibility. A blacklight might provide flourescense to confirm this. To diagnose it we do a DTM culture test. But, to be completely honest I start treating for it anyway with OTC miconazole cream. (Used for yeast infections in women).
3. Neurological concerns are on the rule out list, BUT, I would expect to see other signs like ataxia, instability, hind limb weakness, involuntary urination or defecation, etc.
A physical exam by your vet to include rectal palpation (check anal sacs just to make sure this is not the problem) and a fecal for parasites are all good places to start.
Hope this helps,
All my love to all of you guys,
Krista

Hello,
I am sorry to hear about your kitty. Has the vet talked to you about a full blood work panel and a urinalysis? Checking blood pressure? starting fluid therapy? and a phosphate binder? I would probably start here and discuss a dental down the road after her numbers stabilize. If possible I always recommend seeing a feline specialist or internal medicine specialist or making an appointment with your vet to come up with a treatment plan for her now.
I hope this helps.
good luck!
Please let us know how she is doing
krista

Hello,
I am not a holistic vet but if you were my client I would inquire about doing a culture and sensitivity of the fluid or cytology making sure it isn’t infection or a mucocele or salivary gland abnormality. I would be curious to see if there is more to this than a seroma. I hope this helps.

Hello,
I think that Royal Canin is a very good diet for cats. But, I don’t know anything about your cat so the best person to answer this is your vet.

I’m sorry to hear about your cat. This cannot be answered without an in person exam and review of the radiographs. I strongly recommend that you seek a specialists help and give her rest in a cage so she cannot hurt herself further.

Hello,
It can be anything from infection, disease, trauma, self traumatization (licking the end of the tail), infection, parasites, etc. I would look for other areas of hair loss or irregular skin and talk to your vet if it worsens or persists.