Boils, which look like large pimples, are tender, red bumps on the skin caused by bacteria. Boils are typically minor infections that can be treated at home.

Coughs are common in toddlers, and can be caused by the common cold, whooping cough or other viruses. The Food and Drug Administration warns not to give children over-the-counter cough medicine because of the risk of overdose and side effects such as heart problems.

According to PubMed Health, autism is a developmental disorder that is present before the age of 3. People with autism have difficulty with social interactions and communication skills. There is no cure for autism, nor do scientists know the cause.

A toddler can become sunburned in a matter of minutes, but symptoms may not show up until six to 12 hours following sun exposure. Even minor sunburns in toddlers can leave the skin warm, red and painful and interfere with sleep. More severe burns can cause chills, blisters, headaches, vomiting and general illness.

A child's first birthday often marks the transition from formula to cow's milk and more solid foods. At this point, most babies already have a taste of mashed baby food and possibly table food.

Parents do everything to keep their kids healthy, but kids still get sick. If your toddler experiences a rash and diarrhea, he may have a medical condition, such as fifth disease or a milk allergy. Diarrhea can also be the cause of a toddler’s diaper rash.

Dehydration occurs when the body does not get all of the fluid that it needs to operate properly. According to the Babycenter website, babies and children are more susceptible to this condition. Your toddler can develop dehydration if he has a fever, sweats profusely, vomits or experiences chronic diarrhea.

Up until now, your child has spent a lot of time being coddled and held and taught. Now that she’s 2 years old, she’s ready to take on the world on her own terms. While turning 2 brings other exciting milestones, one most notably is the prevalence of tantrums and other acts of defiance.

Your toddler has been playing all day, and now there's a mysterious rash under his arm. If a rash appears under your toddler’s arm with no other symptoms, it could be from contact dermatitis, atopic eczema or even Lyme disease.

Vegetables can be one of the most difficult foods to convince your toddler to eat. It is important to feed your toddler vegetables because they contain key vitamins, minerals and antioxidants that support healthy growth.

Potty training can be a long process. Most children are ready to begin potty training at 24 to 27 months, according to the University of Michigan Health System. However, you can start as early as 16 months.

In order to assist doctors in plotting children's height and weight, the Centers for Disease Control and Prevention developed growth and weight percentile charts. These charts show how the size and growth patterns of one child compare with other children of the same age and gender.