If your thyroid gland is overactive or underactive,
your hair may fall out. This hair loss usually can
be helped by treatment of the thyroid disease. Hair
loss may occur if male or female hormones, known as
androgens and estrogens, are out of balance. Correcting
the hormone imbalance may stop your hair loss. Many
women notice hair loss about 3 months after they've
had a baby. This loss is also related to hormones.
During pregnancy, high levels of certain hormones
cause the body to keep hair that would normally fall
out. When the hormones return to pre-pregnancy levels,
that hair falls out and the normal cycle of growth
and loss starts again.