is very unlikely and the symptoms you describe are against scabies and therefore no need for lindane.
This is acute urticaria
and occurs due to histamine
release that is occasionally triggered by nfections such as UTI, pneumonia
etc and (also scabies incidentally) but the histamine continues even after the treatment for the infection is completed. The UTI may have triggered the urticaria in your case and am not sure why you need the tramadol
. Opiate analgesics can worsen urticaria control, so please ensure this is not the case.
Long-acting nonsedating antihistamines for 3 months is the treatment and upto twice daily is standard treatment.
80% of urticaria is non-allergic.