I'm sorry to hear about your fall and neck stiffness. This could be due to muscle strain or a minor injury from the slip.

• You might consider using a muscle relaxant and pain relief medication like Myospaz Forte, which contains diclofenac, paracetamol, and chlorzoxazone, to help reduce pain and muscle stiffness. However, this should only be taken under a doctor's prescription and guidance.
• Apply gentle heat or cold packs to the neck area to ease stiffness.
• Avoid sudden neck movements and rest as much as possible.

If your neck pain worsens, you experience numbness, weakness, severe headache, or difficulty moving your arms, seek immediate medical attention. Otherwise, please consult an orthopedic specialist or a neurologist to evaluate your injury and recommend appropriate treatment.To narrow down potential causes, we will need some more information.I understand you slipped and your neck feels stiff. Could you please share your age and gender with me?