Whether or not you should use hair growth oil every day and every month depends on the specific oil you are using and your hair type. Some hair growth oils can be used daily, while others are better suited for less frequent use. It's also important to consider how much oil you're using and how it affects your hair's natural oils.
In general, it's best to start by using hair growth oil once or twice a week and gradually increase the frequency as your hair adapts to the product. Some people may find that using hair growth oil daily leads to excessive buildup or greasiness, while others may find that their hair thrives with daily use.
It's also a good idea to follow the instructions on the product label and do some research on the specific oil you're using to determine the best frequency for your hair type and needs.
In summary, using hair growth oil every day and every month may be suitable for some people, but it's important to consider factors such as the oil type and your hair type, and start with a lower frequency and adjust based on how your hair responds.