A rash with small red dots can be either a heat rash, atopic dermatitis, contact dermatitis or KP.
If you have small red dots that appear on your skin and they are tiny red flat spots then it can be Petechiae.
Petechiae are tiny red, flat spots that appear on your skin.
They're caused by bleeding.
They sometimes appear in clusters and may look like a rash.
If you have tiny red, purple, or brown spots on your skin, they could be petechiae.
Petechiae are tiny spots of bleeding under the skin.
They can be caused by a simple injury, straining or more serious conditions.
If you have pinpoint-sized red dots under your skin that spread quickly, or petechiae plus other symptoms, seek medical attention.
Stress rashes often appear as raised red bumps called hives.
They can affect any part of the body, but often a stress rash is on the face, neck, chest or arms.
Hives may range from tiny dots to large welts and may form in clusters.
Autoimmune rashes can look like scaly red patches, purplish bumps, or more.
The appearance of autoimmune rashes will be different, depending on which autoimmune condition is triggering the skin rash.
For example, cutaneous lupus may cause a scaly red patch that does not hurt or itch.
A heat rash looks like: A group of small red bumps (1 to 2 millimeters), similar to tiny pimples or blisters.
The skin beneath the bumps is flesh-colored or red to purple.
Polymorphic light eruption can be easily mistaken for heat rash (prickly heat).
Prickly heat is caused by warm weather or overheating, rather than sunlight or UV light.
The skin in prickly heat does not "harden" or desensitise, as it can do in polymorphic light eruption.
With treatment, heat rash will clear up in 2 to 3 days.