I would like to answer your query in parts:
a) Gradual hair loss, for example, over a number of years, should be differentiated between rapid-sudden hair loss. If you have noticed progressive thinning of your hair, leaving your parting line and temple scalp more visible, it is possible that you are having female-pattern hair loss.
However, if you notice sudden and rapid shedding of large amounts of hair, that could point to a different hair loss condition e.g. telogen effluvium
Do note that these 2 different hair loss conditions can occur together.
b) The first step in managing this problem is to establish a diagnosis of your hair loss condition. This will include a visit to a doctors' clinic for a thorough clinical examination and likely include blood tests to ascertain if there are medical or nutritional causes for your hair loss.
The treatment of your hair loss condition would depend on what your hair loss doctor finds from the examination and blood tests. Any nutritional deficiencies must be addressed either by changing your diet or by taking supplements. Any medications that you might be taking that are accelerating your hair loss might need to be stopped. Medical conditions that may warrant a referral to a specialist would include lupus, thyroid conditions etc.
c) Some treatment possibilities include topical minoxidil spray or foam, oral tablets that control hair loss, nutritional supplements, scalp treatments.
Female pattern hair loss has many contributing causes and in order to manage the hair loss, these causes need to be addressed.
While I would not label any hair loss condition as 'incurable' per se, it can be a prolonged and progressive condition that may lead to significant cosmetic "problems" if left untreated.
I hope this helps.
Dr Joshua Chong