Used minoxidil for 16 days on one eyebrow. Will I loose healthy hair if stopping?

It's understandable to be concerned about potential side effects when using minoxidil, even for a short period. Minoxidil is primarily used to treat hair loss on the scalp, and while it can promote hair growth in other areas, its effects can vary. Applying it to your eyebrow for 16 days is unlikely to cause significant or permanent damage to the healthy hair there.

If you stop using minoxidil, any hair growth stimulated by the product may gradually return to its natural state, which could include some shedding of hair that was in the growth phase due to minoxidil. However, this should not affect the overall health of your existing eyebrow hair.

If you notice any unusual changes or persistent shedding, it may be beneficial to consult with a dermatologist to discuss your concerns and explore other options for eyebrow hair growth.

It's unlikely that applying such a small amount of minoxidil for just 16 days would cause permanent damage or long-term hair loss in the affected area. Minoxidil-induced shedding, if it occurs, is usually temporary and part of the natural hair cycle, as it pushes older hairs into the shedding phase to make way for new growth.

Since you stopped after a short time, any shedding you experience is expected to stabilize, and normal hair growth should resume within a few months. Eyebrow hair grows at a slower rate than scalp hair, so it might take some time to notice regrowth fully.

If you’re concerned about lingering effects or have ongoing hair loss, consult a dermatologist for a professional evaluation and peace of mind. In most cases like yours, the shedding is temporary and resolves naturally.