Scar tissue can form for a number of reasons, not healing properly, infection, improper surgery
Foam or Head can be caused by improper beer temperature, gas pressure (usually co2), agitated keg, un-clean plumbing or improper serving technique. Good luck isolating and fixing!
Yellow poop in chickens is caused from a digestive upset. In turn, this upset can be caused by SICKNESS, INFECTION, de-worming medicine, STRESS, improper diet, and recent diet change.
It is when the paint dries to a bumpy finish resembling an Orange peel. It is usually the result of improper painting technique, and is caused by the rapid evaporation of thinner ,or improper spray gun setup, spraying the paint at an angle other than perpendicular, or applying excessive paint.
Infection caused by bacteria
It is caused by a virus infection
Manipulation has rarely caused problems. Once in a while too forceful a thrust and/or improper technique has damaged structures in the neck and caused serious problems. The most common adverse event, though, is misdiagnosis. Cancers have been missed.
Bad breath is usually caused by an infection in the mouth, excessively dry mouth, and the improper cleaning of the teeth. You can treat it by going to your dentist regularly or buy a halitosis kit.
Infectious
PID can be caused by a bacterial infection during pregnancy.
Yes. It is caused by viruses.
Incomplete fusion or poor penetration in welding can be caused by inadequate heat input, improper welding technique, improper preparation of the joint surfaces, insufficient welding current, incorrect welding speed, or using the wrong welding process for the specific material being welded.