Here is medical advice about over-the-counter or prescription creams, scar ointments or gels.

• These products can be used to treat scarssc that are caused from surgical incisions or other injuries or wounds.
• If you are under the care of a plastic surgeon and your scarring is the result of cosmetic surgery, ask your surgeon for his or her recommendation
• (Prescription) treatments can include corticosteroids or certain antihistamine creams for scars that cause itching and are extremely sensitive.
• Reviewed by doctors at the Cleveland Clinic Department of Plastic Surgery

Doctors acknowledge over-the-counter treatment is often sufficient.

• Scar (ointment) may help reduce the appearance of some scars.
• Results vary — and no scar can be completely erased.
• If you’re concerned about the appearance of a scar, ask your doctor about other treatment options.
• Possibilities may include…silicone-based products, laser treatment, or collagen or steroid injections.

Source:  mayoclinic.com

Silicone-based scar products are frequently used as parallel therapy with laser treatment, collagen or steroid injections, and dermabrasion.