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Heartburn is a burning feeling in the chest caused by stomach acid travelling up towards the throat (acid reflux). If it keeps happening, it's called gastro-oesophageal reflux disease (GORD).
Acne is where pores in the skin become blocked. Often, this is due to a substance called sebum which is produced by glands in the hair follicles. Sebum normally helps keep the skin moisturised and water-proof. But too much sebum can cause acne. When pores get blocked they may become inflamed or infected, creating red bumps in the skin. Whilst getting spots is normal, acne involves a lot of spots on the face, back and sometimes the chest. The types of spots include black and whiteheads, pustules and even cysts. Acne is triggered by hormonal changes at puberty or the menstrual cycle but also during pregnancy. At best acne is embarrassing, especially when you are young, but it can also cause scarring.