Possible botox reaction? Lumps on head (Photo)

Swelling at the injection site is common following Botox treatment, and typically resolves after a few days. But it may take up to weeks for the goose egg to go away. Acetaminophen (Tylenol) will help alleviate headache pain. Avoid non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or aspirin, Large, hard lumps that are present at the injection site are usually caused by some trauma to a local small blood vessel. Skin nodules and lumps are rarely seen as a side effect of botulinum toxin treatment.

Bumps on the forehead after botox typically resolve within a day or two, they never persist beyond that.
Have you had any other treatments to the forehead such as fillers or implants? That could be a possible explanation.
Seek out a trusted provider and arrange a consultation