What does it mean when a horse won’t stand on his hoof? He just rests it and tries to walk more on his toe (checked hoof nothing, had hoof trimmed yesterday).
Trimming might well have been done poorly or too aggresively. Soreness resulting after or from trimming is, unfortunately, not uncommon. If you have an Easy Boot on hand or another brand of hoof boot, I’d suggest putting it on for a bit. Otherwise I’d have a vet look at it. Vet woukd likely prescribe an antinflammatory/painkiller. Good trimming should NOT result in soreness or lameness.