Does slight bloody bleeding after masturbation mean the loss of the hymen, especially since nothing was inserted, and can a mother distinguish this through the blood?

Masturbation is forbidden (haram). It may, in rare cases, lead to the rupture of the hymen, but this cannot be identified by blood. One must repent to Allah the Almighty, seek His forgiveness frequently, and feel remorse. It is also advisable to conceal one's deed.