It's due to hormonal changes. 
But u shud rule out medical causes 
Check for iron levels, thyroid, Vit D and B 12 levels. 
what you can do 
1.Start Homeopathy it helps curb hair fall. 
Also use Arnica shampoo and oil regularly with internal homeopathic medicines
2.Start with Follihair tablets. 
3.Take good care of nutrition. 
Up ur protein intake. 
Have plenty of veggies n fruits 
Increase your fluid intake. 
4.Don't use any harsh products and colours. 
Refrain from ironing or treatments. 
Don't blow dry. 
Don't comb when hair is wet
5.Stress less n sleep well and get some ME time.

me too facing d same problem of severe hairloss..&nbsp; &#128545;&#128545;

Post delivery there is dramatic drop in progesterone levels and this causes hair fall which is very noticeable. This is part of a cycle and will settle down about six to eight months post delivery. However it is important that you also ensure that you eat a healthy and balanced diet so that there is no nutrional deficiency.

dear guest, i have tagged an expert to advise you...

I'm new to this app, is my question answered

I'm mother of 4month old baby... loosing lot of hair... i lost almost 60%.. i have long hair... please suggest any medication for stop hair loss... I'm breastfeeding... I'm doing oil massage.. no use...