google alopecia - I hope it is telogen - your hair grows back
from the NHS site I got this:
Telogen effluvium
Telogen effluvium is a type of temporary hair loss that can be caused by your body reacting to:
hormonal changes, such as those that take place when a woman is pregnant
intense emotional stress
intense physical stress, such as childbirth
a short-term illness, such as a severe infection or an operation
a long-term illness, such as cancer or liver disease
changes in your diet, such as crash dieting
some medications, such as anticoagulants (medicines that reduce the ability of your blood to clot) or beta-blockers (used to treat a number of conditions, such as high blood pressure)
Page last reviewed: 12/11/2012