Welcome to health care magic forum,
well it may be possible that your father may be suffering from initial stage of varicose vein
, or this bluishness may be due to the cold
weather of jammu, so that is the reason why doctor has not prescribed anything to your father, so it is better to give your fatehr warm drinks and keep him warm, and you can ask him to sleep with raised legs by keeping pillow under the foot while sleeping.
rest you can send us photos of the condition on firstname.lastname@example.org or visit us at www.drkackerhomeopathy.com