Can I use hydroquinone 4% under/with silicone scar strips?

Thank you for sharing your question. There should not be any issue with using hydroquinone and silicone sheets for scar improvement.

Hydroquinone can cause skin irritation by itself and I would image that chance will be intensified if you cover with the silicone.

Dear Generous705169,
I understand your concern. It is best that you consult your plastic surgeon regarding post operative care and management (i.e including massage techniques and timing) specific to your case. Your surgeon knows your condition well and has preferences on when and what to use for faster healing and recovery. Post operative care and management depends on the type of surgery performed and the technique used during surgery among other factors.It is best, however, that you follow your plastic surgeon's advice on post operative care management for a smooth and faster healing and recovery.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Hi and welcome to our forum!
Hydroquinone will lighten skin in areas of post surgical hyperpigmentation. Care must be taken with application not to apply to surrounding non-affected skin as it may become hypopigmented. As you are utilizing silicone scar strips, that may be somewhat difficult.
As every plastic surgeon has his / her own individual postoperative protocol, you should obtain approval before utilizing this product.
Best wishes...