Hi,
You could apply calamine lotion and take OTC antihistamine medications for a few days and see if the lesion subsides.
If the itchiness still persists, it would be best to consult your doctor or oncologist earlier and get a clinical examination done.
Do keep us posted about how you are doing.
Hope this helps.
Good luck.
Hi.
The itchiness could be due to a skin disease (dermatitis).
However, it would be best to consult your oncologist now for proper evaluation and management. Perhaps a skin scraping can be done to rule out the possibility of a fungal infection.
Good luck.