Most of the time change of place and water do cause hair fall but receding hairline is male pattern hair loss . This is genetic usually . But you can consult a dermatologist forgone problem, the best guide for you and may suggest investigation if required or treatment, shampoo , ointment or transplant whatever is needed according to your case Don’t panic but see a specialist for your solution

Many kind of medicines and hairoil are available. However all these will take time. Almost 4-5 months minimum

If hard water, use water softner for bathing, if dandruff treat for shampoo which suits you. Take cap Biotin 10 mg once daily for a month

Take tablet trichoton AT once a day

Sometime hair loss occurs due to dandruff or stress or tension. Need to understand your problem. Discuss online

Hello sir good evening. I think change in work environment and stress  may be cause. Please consult  general physician at your local area.