Postpartum causes hair loss and skin issues. As above, the dermatologist will help, or you can try and manage it at home. Also, I would go and see a GP just to get a full check and see if your thyroid and hormones are normal
Make sure you’re not lacking in nutrients needed for healthy skin and nails and hair also. Keep taking your prenatals, or switch to a women’s multi, add a “hair skin nails” into that. Rich wholesome diet, lots of water, greens and fruits. A collagen powder. That’s for long term though. For now yes a dermatologist can potentially help.
A dermatologist, but you might have to go through your regular dr first