Pain in the legs. Includes hip, knee, ankle and toe joints. Includes minor muscle strain from hard work or sports (overuse). The pain is not caused by an injury.

Head lice is a scalp infection with tiny gray bugs (lice). Lice lay many white eggs (nits) in the hair.

Lyme Disease is a bacterial infection spread from a deer tick bite.

Lymph nodes are small bean-shaped lumps found under the skin. Also called lymph glands.