Attention to itching makes me unable to focus on anything else I am spending some time alone in a day (in solitude). During that alone time and during the rest of the day i am feeling itching and tingling. I can ignore both by just watching it as someone described in the below article about itching. However, both are really annoying and feels like i'm unable to focus on anything, as my focus then turn to the itch/tingling.

Reference: https://zenhabits.net/itchy/
Here's the canonical answer:

In this way he dwells contemplating feelings in feelings internally,
or dwells contemplating feelings in feelings externally, or dwells
contemplating feelings in feelings [both] internally and externally;
or dwells contemplating in feelings [their] nature of arising, or
dwells contemplating in feelings [their]  nature of vanishing, or
dwells contemplating in feelings [their] nature of [both] arising and
vanishing.  Or else his mindfulness that ‘there are feelings’ is
established simply to the extent necessary for bare knowledge, for
repeated mindfulness. And he dwells independent, and does not cling to
anything in the world. Thus also, monks, a monk dwells contemplating
feelings in feelings. (Satipaṭṭhāna Sutta, MN10 translated by Aggacitta Bhikkhu)

Take note though that feelings here does not refer to the itch, but how you feel about it.