Little white lumps like pimples only on the upper arms and legs a toddler?

It is important to note that I'm not a medical professional and cannot provide medical advice. If you have any concerns about your child's health, it is important to consult a doctor.

With that said, white lumps on the upper arms and legs of a toddler can be caused by a number of things, including:

- Keratosis pilaris: This is a common condition that causes small, rough bumps to appear on the skin. It is harmless and usually goes away on its own.

-Folliculitis: This is a bacterial infection of the hair follicles. It can cause small, pus-filled bumps to appear on the skin.

-Molluscum contagiosum: This is a viral infection that causes small, pearly bumps to appear on the skin. It is contagious and can be spread through skin-to-skin contact.

-Other skin conditions, such as eczema or psoriasis, can also cause white lumps to appear on the skin.

If you are concerned about the white lumps on your toddler's skin, it is important to consult a doctor to get a proper diagnosis and treatment plan.