Upper Eyelid Swelling After Using Botox

Muscles can act as fluid pumps and they accomplish this goal in the legs. That is why your ankles swell with prolonged swelling. To some degree the same happens with your forehead and peri-orbital region. With profound muscle denervation, the fluid can accumulate particulary with your head in the supine position.  Generally this effect should dissipate as the Botulinum Toxin (Dysport and Botox) wears off.

At 4 months most negative effects of Botox would disappear. If the Botox caused drooping of the eyebrows and heavy eyelids presenting as puffy lids, then you would expect it worse after sitting up from gravity's effect and yours gets better. Swelling after morning awakening when the head is flatter usually means fluid swelling related to allergies, sinuses, low protein in the blood, heart failure and other systemic issues. See an internist for a full evaluation.

Swelling of the eyelids in the morning is more than likely not related to the Botox.  Botox can drop the eyebrow and even the eyelid but usually this is noted when you sit-up or stand.  You  may want to pursue a medical work-up to get a general physical.  It can also be allergies to name just one possible cause.