Dear Don,
I am so sorry your wife is going through this excruciating experience. Your wife had her lymph nodes resected from her axilla. Does she suffer from lymphedema, now? Does she always get her BP and blood draws done on the opposite arm? Is she considered "cured"
regarding the melanoma?
The risk increases for Herpes Zoster-Shingles on a traumatized body part, and the risk for lymphedema might rise slightly with Herpes Zoster-Shingles.
I have/had breast cancer with lymph node resection (excellent prognosis), but I never allow BPs, IVs, or blood draws in that arm, ever.
I would ask for the antiviral, Famciclovir 500mg three times daily for seven more days, starting now.
It is the newest and most efficacious drug, and the tablets are smaller than Valcyclovir-Valtrex 1000mg. Valtrex is based on Acyclovir, the oldest antiviral, which is less effective. Varicella is somewhat resistant to Acyclovir. Frankly, Valtrex stopped working on me, and I have difficulties swallowing the large capsules as Herpes Zoster-Shingles affects my ear and throat. She is not getting an effective dose with Valtrex 500 mg. 3x daily, so she should change STAT to Famciclovir 500 mg 3x daily to achieve the effective dose to stop the viral replication.
In a textbook case, the vesicle-blisters occur in crops over a period of five days. Please remember that this nasty virus does not read the textbook.
I am concerned that your wife has a history of malignant melanoma. If she is having metastatic disease, Herpes Zoster-Shingles could be a portent of metastasis. She needs to see her oncologist for follow-up.
The pain usually gets worse after the first couple of days. As your wife has an extensive case with severe pain, I would be assertive and request (demand nicely) oxycodone 10 mg every 6 hours for pain. I know the lancinating pain where a mere wisp of breeze sets off paroxysms of agony again and again, with no sleep night after night.
Cool compresses help decrease the pain. Heat worsens the pain!!!
Bactine or Solarcaine with Aloe both contain Lidocaine to numb the nerve endings topically. These can be used as an adjunct to the oxycodone 10mg. The arm should be elevated above the heart to prevent swelling. Absolutely no scratching or picking allowed as you do not want a secondary bacterial infection. If your wife does not have good pain control, she runs the risk of developing Post Herpetic Neuralgia PHN. This is why it is essential to get her on Famciclovir, and Oxycodone, a much stronger analgesic, and use a Lidocaine spray on her arm. Nothing will totally alleviate the pain, but these measures, and your comforting her, will help markedly.
The pain might lessen after 3 weeks, if she is lucky...
I am a Nurse Practitioner in the States. I have had Herpes Zoster-Shingles in my right ear every three to five weeks for the past twenty-one years and twice in my right eye. I am 66 years old.
I am so sorry I didn't respond sooner, but I just received your post in my email.
Best Wishes
Merry Juliana