Question Summary:
Is it permissible for women to do hair lining treatment?

Question Detail:

Assalamualaikum, I'm 23yrs old ,grl,n I have a very broad forehead, can I go for hair lining treatment, is it permissible in Islam??? It's urgent

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
 
Our understanding of the situation is as follows:
 
You have a broad forehead due to your receding hairline and wish to reverse the loss of your hair.
 
If this is correct, you may use treatment to make your hairline grow back to its original place via various creams, growth balms, natural remedies etc.[1]You may consult a cosmetologist/doctor in this regard to determine which method would be most effective for you.  
 
It should be noted that one must take utmost precaution to refrain from products containing Haram ingredients. 
 
And Allah Ta’āla Knows Best
Abdullah ibn Mohammed Aijaz
Student Darul Iftaa
Baltimore, USA 
Checked and Approved by,
Mufti Ebrahim Desai.