What causes memory problems?

Forgetfulness is more likely when attention is overloaded by stress, anxiety, low mood or exhaustion. Insomnia and obstructive sleep apnoea can leave the brain less rested, affecting recall and concentration. Medicines, alcohol, head injury and infections can also play a part. Vitamin B12 deficiency and an underactive thyroid are treatable physical causes. Memory changes that gradually affect familiar tasks may occur with dementia, while Long COVID can include difficulty concentrating or remembering words. These possibilities overlap, so the pattern and timeline matter.

Write down examples, when they started, and whether they are worsening. Bring a complete medicine and supplement list, including products bought without prescription. Use calendars, reminders and one consistent place for keys or medicines. Regular sleep, movement, meals and social contact support attention. A clinician may review mood and sleep, perform a brief memory assessment, examine you and arrange blood tests or further evaluation when indicated.

Make an appointment if memory changes persist, interfere with work or daily tasks, or concern you or someone close to you. Seek urgent help for sudden confusion, new weakness, facial drooping, speech difficulty, severe headache or memory loss after a head injury. Rapid deterioration, getting lost in familiar places, or unsafe medication use also warrants prompt assessment.

Could sleep, mood, medicines, thyroid function or vitamin B12 be involved? What changes should a family member monitor? Do I need a memory assessment or further tests?