Horizontal Indent line under brow. How can this be fixed? (Photos)

Thank you for sharing your question. Without photographs of your face at rest, as well as making the standard animations of the forehead and glabella it is difficult to comment. Seek out consultations in your area to get the best advice.

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

Thank you for your question and for providing photos. The cause of the indent you’re referring to is likely aging and not related to the Botox injections. Administering a conservative amount of filler into this area can provide the necessary lift to restore volume and smooth the indention. Due to the sensitive nature of the area around the eye, a great deal of skill and precision are necessary to achieve the best possible results. The use of a microcannula is preferred to minimize bruising and swelling and ensure the smoothest outcome. I recommend scheduling an in-person consultation with an experienced expert injector who can review your treatment history and determine the best course of action.

Thank you, traycc76 for your question and photographs.
Photographic evaluation is incomplete without personal examination to give a most appropriate answer
However from the photographs, it seems that,
The horizontal indent is not likely to be caused due to botox because as you mentioned you had been getting botox between the eye and upper forehead. The horizontal indent may be due to aging or your skin's tendency.

Please consult a board-certified dermatologist near you and discuss this in detail.
Wish you an alluring look.

Ablative Erbium resurfacing for the surface, and carefully filler with a cannula (to minimize the risk of getting into A vessel) like Restylane Kysse or RHA Redensity can help.