Thanks for sending across your query.
Masturbation is a healthy activity, it is harmless expression. Masturbating 2-3 times a week is normal, but anything in excess may affect your health.
Masturbation has nothing to do with hairfall, there may be other reasons like:
Thyroid, stress, constipation etc.
For Hiatus Hernia you may consult your nearest urologist.
Yes you can have oral sex.
Health Tips
For more information you can visit the website- www.drmongaclinic.com