wimmeln von
to teem with
To be present in large numbers and in disorganized movement in one place. It is mostly used for a large number of people or animals.
Der Marktplatz wimmelte von Touristen.
The marketplace was teeming with tourists.

to teem
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to teem with
To be present in large numbers and in disorganized movement in one place. It is mostly used for a large number of people or animals.
Der Marktplatz wimmelte von Touristen.
The marketplace was teeming with tourists.

The verb 'wimmeln' (to teem) is almost always used with the preposition 'von' and the dative. The structure is: place + wimmeln + von + dative.
Der Ameisenhaufen wimmelte von Ameisen.
The anthill was teeming with ants.
'Wimmeln' (to teem) is very often used with the impersonal pronoun 'es'. The structure is then: place + wimmelt + es + von + dative.
Am Strand wimmelte es nur so von Badegästen.
The beach was absolutely teeming with bathers.
In the figurative meaning, 'wimmeln von' (to be full of / to teem with) is often used for negative things. Typical combinations are 'von Fehlern wimmeln' (to be full of mistakes), 'von Widersprüchen wimmeln' (to be full of contradictions), or 'von Problemen wimmeln' (to be full of problems).
Sein erster Entwurf wimmelte von logischen Fehlern.
His first draft was full of logical errors.
to rave / swarm
'schwärmen' and 'wimmeln' can both describe many people or animals being in one place or in motion. 'schwärmen' tends to emphasize movement as a group, for example with bees, birds, or people enthusiastically streaming somewhere. 'wimmeln' more often describes a place where very many people or animals are moving around chaotically. Learners may confuse the words because both have to do with large numbers. As a simple guide: something 'schwärmt los' or 'schwärmt herum' (sets off / moves around in a swarm); a place 'wimmelt von' people or animals (is teeming with them).

Im Garten wimmelte es nach dem Regen von kleinen Käfern.
After the rain, the garden was teeming with small beetles.
Nach dem Konzert schwärmten die Fans zum Ausgang.
After the concert, the fans swarmed toward the exit.