[Skin concerns] Rapid eyelid aging (starting to sink, cross hatched, thin skin, hollow under eyes), is it just "normal" to see aging happen over the course of months? (31yo)

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Hi, I went from getting carded at 30 to avoiding mirrors in the course of 6 months. I had milky plump eyelids and now the inner corner is sunken, this cross hatch wrinkle pattern appeared on my inner and middle eyelids and the proper eyelid (above lashes) is so thin I can see the veins (which makes the skin look brownish). In the year that this happened the following things changed in my life:I changed jobs (air conditioned office, windows don't open)I lost maybe 5 kilo (which I am now gaining back hoping this will help)I had pneumoniaI drank way less milk (now trying to go back to old dietary habits in case this had something to do with collagen)Could any of those things have such a rapid effect on the eyelid skin? (I also have hypothyroidism)When I do the collagen test (pinch skin to see if the "skin tent" appears) the skin on my eyelids does form the tent for a while (my hands on the other hand not at all).My skincare routine before this was Nivea soft and sunscreen and water (no makeup). I now got into topical vitamin A but can't say I'm seeing any results. I am willing to try some collagen procedures/treatments but what can be done for the whole eyelid (from eyelash line to brow)? I want my plump eyes back:(
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Submitted by smellmynavel