Found a small cyst with some pus under my skin on my chest. was found after taking off a tight shirt. does wearing tight clothing cause this?

No: Tight clothing does not cause cysts. Perhaps right clothing aggravated a cyst causing it to swell. Pus indicates an infection which is not characteristic of a cyst.

NO : Tight clothing does not cause a cyst or small pustule. Acne like lesion are not uncommon on the chest. When some one sweats a lot such as running or hard work , etc this can help cause this problem. If you have acne , you would be more prone to have this.