If you have noticed a white pimple-like growth on your rabbit baby's genitals, it's essential to monitor it closely and consider seeking veterinary advice. Without a physical examination by a veterinarian, it can be challenging to determine the exact cause of the pimple. However, here are a few possibilities:

1. **Sebaceous Cyst:** It is possible that the white pimple is a sebaceous cyst, which is a common skin condition in rabbits. Sebaceous cysts are usually harmless and form when the oil glands become blocked. They can vary in size and may resolve on their own or require medical intervention.

2. **Abscess:** An abscess is a localized infection that can appear as a lump or pimple-like swelling. It occurs when bacteria enter a wound or skin follicle, causing a collection of pus to form. Abscesses may need to be drained and treated with antibiotics by a veterinarian.

3. **Furunculosis:** Furunculosis is a bacterial skin infection that can cause small, painful bumps or pustules. It can occur in various areas, including the genitals. Treatment typically involves antibiotics prescribed by a veterinarian.

4. **Other Skin Conditions:** There are several other skin conditions that can manifest as pimple-like growths, such as papillomas (warts), fungal infections, or other types of skin lesions. A veterinarian would be able to assess the specific condition and provide appropriate treatment.

It's crucial to monitor the pimple for any changes in size, appearance, or behavior of your rabbit. If it grows larger, becomes red, inflamed, or if your rabbit shows signs of discomfort or pain, it's best to consult a veterinarian promptly. The vet will be able to examine your rabbit, make an accurate diagnosis, and recommend the appropriate treatment or management options.