ANSWER:

No problem in doing this at home and praying with it. 

The prohibition is in going out with hair tied up like this.

Is it permissible for a woman to tie her hair in a high bun at home and pray with it?

Beautification & Cosmetic Suregry, Halal/Haram Matters | July 17, 2019 6:03 pm
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So when we order pizza, are we obliged to say use a clean cutter. Are we then obliged to say use clean gloves because they serve pepperoni pizza. What if they just use meat that’s not slaughter Islamically? Should we still ask them to use clean cutter?
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I was planning on joining Bangladesh army, where the beard has to be shaved for 4 years during training. However, after training they allow the officers to keep the beard. Is it halal to apply for the army in such a scenario? What is the ruling?