How Soon Can You Reinstall Hair Extensions After Removal?

If the scalp is healthy and there is no obvious damage:

They can be reinstalled the same day.
Many professional salons will:
Remove→ wash hair → replace film→ reinstall
The entire process is completed the same day.
Only the following situations are recommended to rest for 2-4 weeks:
Scalp inflammation
Sensitive scalp
Hair follicles are being pulled
My natural hair has noticeably thinned
Localized hair loss occurs

The so-called "taking a break from hair" is not a must for everyone, but is intended for those who already have scalp pressure.
Usually, as long as:
Regularly adjust the position
Do not stay in the same position for long periods
Do not install too tightly

Continuous long-term wear is also perfectly fine.