Hi,
Thanks for writing in.
Singles infection is caused by the
chicken pox virus reactivation at the dorsal
ganglion of spinal nerves. This condition is usually seen in immunologically weak and in elderly. As your mother is taking
chemotherapy and is also elderly, this reactivation of the chicken pox virus has taken place with a higher magnitude.
Patients with suspected
shingles have to be given a course of
antiviral medicine like
acyclovir or valacyclovir within 72 hours of first appearance of rashes. If not given then the rashes take a longer time and the patient is in more pain and discomfort.
If the rashes are not responding to acyclovir or valacyclovir then it might be resistant to treatment and this has to be followed up with other medicines.
Though the rashes usually fall off in a week in most patients, it is difficult to predict the course of this illness in a patient having lymphoma and in elderly age group. Some patients also require treatment with IV medications and this can reduce the flaring of symptoms.
Shingles pain and discomfort might persist for up to 6 months and there is herpes
neuralgia in which the patient might have burning symptoms for a long time. This is treated with powerful pain relievers.