Does fungal nail infection get better on its own?

Onychomycosis is a worldwide problem and represents a significant proportion of patients coming into clinic seeking diagnosis, advice and treatment. The true prevalence varies from region to region but in adults, estimates suggest around 4% [1] with rates much lower in children [2] - see my earlier article here.  Prevalence in specific patient groups such as patients with diabetes can be much higher at around 22% [3].

Ask AI for a quick answer to the question “Does fungal nail infection get better on its own” and the reply is “almost never”. Of course, this is data is drawn from a range of sources across the web, including published research, guidelines, blogs and government health documents which may convey this.  On the reverse side, patients may imply that their nail infection has “improved” or “disappeared” but there is always the thought that if that’s the case, was it onychomycosis in the first place? After all, 50% of nail dystrophies are not fungal.

An evidence based approach

So, is there any way we can answer this question more scientifically? One recent study has approached this in a novel way. A group of researchers in the United States undertook a review to identify all the available published randomised controlled trials investigating treatments for onychomycosis (excluding lasers) [4]. In the process, they purposely selected only those which had a placebo arm or arms to the study.

They pooled the data of placebo treated patients using a “random effects analysis”. What does this mean? It’s a technique  which permits putting data together from studies which may vary in the type of patients, intervention or setting to allow an evaluation of results.

The study identified 21 studies - most were analysing oral medications (n=15) and some topical treatment studies (n=6) which represented 1477 placebo patients looking at cure rates from 6 to 96 weeks. They reported the results looking at two reported cure rates. The mycological cure rate (demonstrates that removal of fungus from the nail has occurred with a clipping taken before and after treatment demonstrating a positive to negative shift in mycology). The complete cure rate considers the improvement in the appearance of the nail (usually in terms of the reduction in area of discolouration for example) and whether a mycological cure has occurred. For further details see my earlier blog here.

The results from the study highlighted the following:

Mycological Cure in Placebo Group	8.8% (6.5-11.0)
Complete Cure in Placebo Group	1.0% (0.1-1.8)

The results showed that the placebo groups in these studies went from a positive mycological result to a negative result (implying there is removal of the fungal infection from the nail) in 8.8% of cases. However, complete cure rates were much lower in placebo patients at around 1%. It is expected that the complete cure rate will always be lower than a mycological cure rate as the complete cure relies on two factors - negative mycology and improvement in the visual appearance of the nails. The results align with an earlier study which came up with similar figures despite a slight difference in the analysis used [5].

Ultimately, from the available evidence, the chances of a fungal nail nails resolving with no treatment is around 1% but more research is needed to verify this finding.

References

1.            Gupta, A.K., et al., Global prevalence of onychomycosis in general and special populations: An updated perspective. Mycoses, 2024. 67(4): p. e13725.

2.            Wriedt, T.R., et al., A High Estimated Prevalence of Onychomycosis Exists Among Danish Children. Mycoses, 2025. 68(11): p. e70129.

3.            Saunte, D.M., et al., Prevalence of toe nail onychomycosis in diabetic patients. Acta Derm Venereol, 2006. 86(5): p. 425–8.

4.            Falotico, J.M., et al., Systematic review and meta-analysis of placebo cure in onychomycosis clinical trials. JAAD Reviews, 2026. 7: p. 70–72.

5.            Gupta, A.K. and M. Paquet, Placebo cure rates in the treatment of onychomycosis. J Am Podiatr Med Assoc, 2014. 104(3): p. 277–82.