Thanks for writing to H.C.M. for your query.
I have gone through your query regarding bleeding from throat, as it is found in sputum, This all is happening in your grand mother. She says same situation she felt about 50 years back.
with expectoration and few streakes of blood in sputum indicates that she should be investigated for-
(a) X-Ray chest (P.A. view)
(b) Sputum for Culture and sensitivity & Afb.
(c) Direct Laryngoscopy
A thorough examination and co-relation of investigation's report will help in making diagnosis. Once the diagnosis is made one may plan for treatment.