Greetings. Your wife seems to be having diffuse hair fall. This could be because of recent physical / emotional insults or stresses and may be manifesting now. Also -
thyroid evaluation and hemoglobin needs to be checked. She'll need hair care lotions- those with vasodilator properties, also with due correction of underlying problem. See a qualfied dermatologist near you. Further queries may be sent on follow up messaging. warm regards