I asked the trichologist and ultimate hair guru, Philip Kingsley (he has been dealing with problem hair for 50 years, and his wife, like you, has been through chemotherapy). And he says:

Philip says “don’t worry too much as all the hair will grow back anyway, but to help along the way use Philip Kingsley Scalp Mask – massage in the scalp every other day” – see attached



Also if you are going through chemotherapy you may find your skin is very sensitive so you should try and use products with no scents or irritants. Philip designed No scent no colour especially for his wife who also went through chemo. He says, "Don't worry too much as all the hair will grow back anyway, but to help along the way you can try using Philip Kingsley Scalp Mask – massage into the scalp every other day, to stimulate hair growth.” He also has a no-scent no-colour shampoo and conditioner, which he designed for his wife. See www.philipkingsley.com for products