Hello...
Your mother is suffering from Chronic suppurative otitis media with perforation of tympanic membrane.
Next Steps
she will need tympanoplasty i.e a new drum will be kept surgically which may be a cartilage or muscle covering [fascia] with mastoidectomy i.e the air cells of the bone behind the ear would be drilled out.
Health Tips
usually its a safe surgery and with good results if done correctly.