With August flower-bugs (Cimicidae) arrive on veggies such as tomatoes and cauliflowers.
They bite veggies to suck their sap, and the plant reacts against them by thickering its tissue.
The result is ugly to look at, little hard to eat, but not damaging our healt.
To fight them use garlic or nettle macertate. It’s repellent, not a killer, but in this way plants have time to recover and continue to grow.
With temperature decreasing, they stop their ‘job’, till next year.