Thank you for your query.
Viral infections present in varied ways and the itching fingers and redness
of the tips can be a part of it. Had you mentioned the blood reports it would have been better for me to review it and give you a better guidance. In case the itching and redness do not disappear in the next 24-48 hours you should consult your doctor requesting him to review the case.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal