Over masturbation does not lead to infections or cancer. However, it can risk you for sexual disorders. Imporper techniques of masturbating can risk you for a problem of premature ejaculation. Use of pornography while masturbating, can risk you for Erectile Dysfunction. You must learn and know in details about do's and don't's about masturbation from an expert.
Next Steps
Kindly consult with a sexologist. For specific instructions and suggestions about management, you can consult me directly here on practo.