There are a wide vari­ety of scalp infec­tions that can cause severe hair loss. For­tu­nately, most scalp infec­tion can be treated suc­cess­fully and have a sig­nif­i­cant effect on the hair growth. The main causes of scalp infec­tions are bac­te­ria, fun­gus, virus or par­a­sites. Fol­licul­tius is a bac­te­r­ial infec­tion which affects a large area of the scalp. If the infec­tion is deep in the hair fol­li­cles the dam­age may cause for a more exten­sive treat­ment but, if caught in time and treated it will heal quickly. An exam­ple of fun­gal infec­tion is Tinea Capits, which is cause by viral and par­a­sitic fol­li­culi­tis. Gen­er­ally it affects other hair grow­ing areas such as the body, beard, eye­brows, and eye­lashes. Pei­dra is another very com­mon scalp infec­tion that affects both curly and straight hair. It can lead to for­ma­tion of nod­ules on the infected hair, how­ever with care­ful exam­i­na­tion of these scalp infec­tions treat­ment can solve the hair loss.