I am 22 y/o and have noticed the skin around the corners of my mouth has dramatically started to change appearance/sag. (photos)

The corners of my mouth are drawn downwards when in a neutral expression making me appear angry & old. I also have a LOT of smile lines which are not ideal. Skin around the mouth almost appears like it is protruding outwards and I have these weird lines which create an unflattering appearance from every angle. What looks like a lump of fat/skin is VERY visible on side profiles. This is my main concern as no one else has these lumps. What are they? Help!! How do I get a fuller appearance :(

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