What is This Rash?

This is some kind of rash under my right breast. It is very sensitive to the touch. Any idea of what this is! I might be able to figure it out if I have an idea of what it is

What is this rash?

Skin Rash: Symptoms, Causes & Emergency Room Treatment

Butt Rash: Causes, Treatments, and Prevention Tips From Doctors

Rash - child under 2 years Information

Rashes in babies and children - NHS

What is this rash? Is this MCAS? Appeared along with 2nd covid

What is this RASH??? - Baby's First Year, Forums

What is this rash?? : r/CATHELP

Foot Rash: Causes, Symptoms & Treatment

What is this rash/bruise

Hand Rashes - American Osteopathic College of Dermatology (AOCD)

Skin Rashes & Conditions

Pictures of common skin rashes, symptoms & treatments