I gave birth to my son and after 40 days my blood stop few days and then return. I finish that 40 days but I see some blood.what should I do?
If you get the post bleeding for 40 days and then you see your purity, you should take ghusul and pray.
The purity is realized by either seeing a white thread like discharges or by complete dryness.
If the blood returns after that, this is your menses.