Thick hair on chin in female is called hirsutism, its mainly due to hormonal imbalance. We Need to evaluate you for any other signs of hormone derangement like irregular menses,abnormal weight gain,acne around jawline, raised insulin levels,etc.
Once we know your current status of hormones we can suggest a treatment plan for you.For thick hair,diode laser is best but it should be started ideally only if your hormones are normal.
For itching we need to check your skin for boils or acne or some allergy and treatment will depend on that.
Next Steps
Consult a dermatologist for proper examination and treatment plan
Health Tips
Regular exercise and weight reduction helps a lot in case of hormonal imbalance