My son's bass music hurts my ears. he likes it. could it be causing damage to his ears?

Very Possible!: Noise-induced hearing loss has been associated with loud music. Developing noise-related hearing loss depends on the decibel level, your distance from the sound source, and the time of exposure. But if it hurts your ears, you may want to evaluate this further. Please visit http://www.Nidcd.Nih.Gov/health/hearing/pages/noise.Aspx for more information.