Does anyone know what this rash is?

Uploading file...I developed this itchy rash over a week ago on the palm of my left hand. It has now spread to my finger and my other hand and one finger. It is itchy, flesh colored and forms in clustsers. It appeared first on my palm and healed, but is still itchy leaving dry patches and red pin points. Now a patch is on my finger as seen in the attached photo. I haven’t used any new soaps or lotions, have never had dry skin or eczema, & haven’t eaten anything different. I do play in creeks a lot and pick up rocks, so I have come in contact with algae.