Hello & welcome,
Fifth teeth are called as premolars & are most likely affected teeth in Mal-occlusion or wrong alignment of the teeth.
If those teeth are very sharp, they can hurt your tongue during eating creating painful situation along with discomfort.
You will have to visit your dentist
to slightly grind the sharp cusps of the teeth or teeth tips will be rounded off by the dentist to reduce the sharpness.
If both the teeth are not in alignment or out of the arch extremely, then you can go for orthodontic treatment.
One more important thing i will mention here that, in patients like you whose teeth are not properly aligned, chances of food debris & plaque
accumulation are on higher side thus compromising peridontal health surrounding the teeth & may lead to gingival infections.
So, maintain your oral health to optimum level by exercising proper cleaning habits & regular scaling done by your dentist.