Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your query Betnovate contains a steroid Betamethasone and can be used to treat dark spots or hyperpigmentation but as it is a steroid cream on initial use it can help in reducing dark spots but long term use has deleterious side effects like skin thinning, pimples, inflammation, rashes, itching, excess hairgrowth and dilated veins under the skin.. Another drawback is that once you stop using the cream there can be a relapse of the darkening of the skin.. So long term use of such creams is not advisable as in long run the damages are higher then the benefits.. As well as if you still want to use it you should do only under supervision of a Dermatologist.. Other creams that are steroid free can have a slower effect but will not cause side effects and will be beneficial if used in long run.. I would suggest you to consult a Dermatologist and get evaluated and a thorough clinical evaluation can be done.. He can advise you safer depigmentation formulas like facewash containing Salicylic acid.. You can also be advised to apply creams containing Kojic acid, glycolic acid and arbutin.. Vitamin E and C containing creams are also helpful.. Creams with Licorice and grapeseed extract also works well.. You can also exfoliate your skin twice a week. Treatments like Photofacial, Microdermabrasion, dermal rollers and chemical peeling can also be advised.. Hope this information helps.. Thanks and regards.. Dr.Honey Nandwani Arora.